refactor: lay the repository out by role

local/ held six unrelated things under a name that stopped being true once it
became the production runtime: the service, the frontend, the tests, the ops
commands, the container definitions and the dependency lock, 65 files with
nothing to tell them apart.

  app/      the service: api/ routers, core/ for identity, database, models,
            prices and secret loading, and the worker, bootstrap and schema
  tests/    the twelve suites, no longer inside the shipped package
  ops/      backup, readiness, dependency audit, security summary
  infra/    Dockerfiles, gateway templates, ClamAV and storage configuration,
            the requirements and their hash lock
  web/      the Site, Kanban and portal pages with their scripts

deploy/Dockerfile.api now copies app/ alone, so the tests stop shipping to
production; the local image still carries them, because the suites run inside
the stack's network.

Five kinds of reference had to follow, and each was found by something different
rather than by reading. Imports of the form "from . import db" survived a rewrite
that only matched "from .db import". Tests kept relative imports of modules that
had left the package. A mock.patch target names its module in a string, where no
import rewriting can see it. The browser test resolves a fixture by path. And the
release gate's markers pointed at local/runtime.py and local/worker.py, which is
the decay its new marker test exists to catch — it caught it.

Verified from docker compose down -v: the stack starts, all six integration
suites, both browser suites and the twenty-nine unit tests pass.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

ops/storage_backup.py

@@ -0,0 +1,192 @@
+"""Stream clean MinIO artwork to an archive and verify it via an isolated prefix."""
+import hashlib
+import io
+import json
+import os
+import sys
+import tarfile
+from datetime import datetime, timezone
+from uuid import uuid4
+
+from app.adapters import LocalS3Storage, require_local
+from app.core.db import connect
+
+CHUNK = 8 * 1024 * 1024
+MAX_OBJECT = min(128 * 1024 * 1024, int(os.environ.get('SCAN_MAX_BYTES', '134217728')))
+MAX_TOTAL = int(os.environ.get('STORAGE_QUOTA_BYTES', '53687091200'))
+MAX_OBJECTS = 100000
+
+
+class DigestReader:
+    def __init__(self, stream):
+        self.stream = stream
+        self.digest = hashlib.sha256()
+        self.size = 0
+
+    def read(self, size=-1):
+        block = self.stream.read(size)
+        if block:
+            self.digest.update(block)
+            self.size += len(block)
+        return block
+
+
+def add_bytes(archive, name, content):
+    info = tarfile.TarInfo(name)
+    info.size = len(content)
+    info.mtime = int(datetime.now(timezone.utc).timestamp())
+    info.mode = 0o600
+    archive.addfile(info, io.BytesIO(content))
+
+
+def export_archive():
+    require_local()
+    storage = LocalS3Storage()
+    with connect() as c:
+        rows = c.execute("""SELECT id,object_key,size,created_at,expires_at
+            FROM dtf_local.uploads WHERE complete AND purged_at IS NULL
+            AND expires_at>now() AND scan_state='clean' ORDER BY object_key""").fetchall()
+    if len(rows) > MAX_OBJECTS:
+        raise RuntimeError('Object count exceeds the backup safety limit')
+    expected_total = sum(row['size'] for row in rows)
+    if expected_total > MAX_TOTAL:
+        raise RuntimeError('Object bytes exceed the backup safety limit')
+
+    objects = []
+    with tarfile.open(fileobj=sys.stdout.buffer, mode='w|gz', compresslevel=6) as archive:
+        for index, row in enumerate(rows):
+            if row['size'] <= 0 or row['size'] > MAX_OBJECT:
+                raise RuntimeError('A clean object has an invalid backup size')
+            response = storage.client.get_object(Bucket=storage.bucket, Key=row['object_key'])
+            if response['ContentLength'] != row['size']:
+                response['Body'].close()
+                raise RuntimeError('Stored object size differs from database metadata')
+            reader = DigestReader(response['Body'])
+            name = f'objects/{index:08d}'
+            info = tarfile.TarInfo(name)
+            info.size = row['size']
+            info.mtime = int(row['created_at'].timestamp())
+            info.mode = 0o600
+            try:
+                archive.addfile(info, reader)
+            finally:
+                response['Body'].close()
+            if reader.size != row['size']:
+                raise RuntimeError('Object changed while the backup was streaming')
+            objects.append({'archive_name': name, 'upload_id': str(row['id']),
+                            'object_key': row['object_key'], 'size': row['size'],
+                            'sha256': reader.digest.hexdigest(),
+                            'expires_at': row['expires_at'].isoformat()})
+        manifest = {'format': 'dtf-object-backup-v1',
+                    'created_at': datetime.now(timezone.utc).isoformat(),
+                    'source_bucket': storage.bucket, 'objects': objects,
+                    'object_count': len(objects), 'total_bytes': expected_total}
+        add_bytes(archive, 'manifest.json', json.dumps(manifest, sort_keys=True).encode())
+    print('DTF_BACKUP_SUMMARY '+json.dumps({'object_count': len(objects),
+          'total_bytes': expected_total}), file=sys.stderr)
+
+
+def upload_member(storage, source, size, key):
+    upload = storage.client.create_multipart_upload(
+        Bucket=storage.bucket, Key=key, ContentType='application/octet-stream')['UploadId']
+    parts = []
+    digest = hashlib.sha256()
+    remaining = size
+    try:
+        number = 1
+        while remaining:
+            block = source.read(min(CHUNK, remaining))
+            if not block:
+                raise ValueError('Archive object ended before its declared size')
+            digest.update(block)
+            result = storage.client.upload_part(Bucket=storage.bucket, Key=key,
+                UploadId=upload, PartNumber=number, Body=block, ContentLength=len(block))
+            parts.append({'PartNumber': number, 'ETag': result['ETag']})
+            remaining -= len(block)
+            number += 1
+        storage.client.complete_multipart_upload(Bucket=storage.bucket, Key=key,
+            UploadId=upload, MultipartUpload={'Parts': parts})
+    except Exception:
+        try:
+            storage.client.abort_multipart_upload(
+                Bucket=storage.bucket, Key=key, UploadId=upload)
+        except Exception:
+            # Preserve the original upload/read error; the verification-prefix
+            # cleanup below still removes any completed temporary object.
+            pass
+        raise
+    return digest.hexdigest()
+
+
+def object_digest(storage, key):
+    response = storage.client.get_object(Bucket=storage.bucket, Key=key)
+    digest = hashlib.sha256()
+    size = 0
+    try:
+        for block in response['Body'].iter_chunks(chunk_size=1024 * 1024):
+            digest.update(block)
+            size += len(block)
+    finally:
+        response['Body'].close()
+    return size, digest.hexdigest()
+
+
+def verify_archive():
+    require_local()
+    storage = LocalS3Storage()
+    verification = uuid4().hex
+    restored = []
+    observed = []
+    manifest = None
+    total = 0
+    try:
+        with tarfile.open(fileobj=sys.stdin.buffer, mode='r|gz') as archive:
+            for member in archive:
+                if not member.isfile():
+                    raise ValueError('Backup archive contains a non-file member')
+                source = archive.extractfile(member)
+                if source is None:
+                    raise ValueError('Backup archive member cannot be read')
+                if member.name == 'manifest.json':
+                    if manifest is not None or member.size > 1024 * 1024:
+                        raise ValueError('Invalid object-backup manifest')
+                    manifest = json.loads(source.read().decode())
+                    continue
+                expected_name = f'objects/{len(observed):08d}'
+                if member.name != expected_name or len(observed) >= MAX_OBJECTS:
+                    raise ValueError('Unexpected object-backup member')
+                if member.size <= 0 or member.size > MAX_OBJECT:
+                    raise ValueError('Object-backup member exceeds safety limits')
+                total += member.size
+                if total > MAX_TOTAL:
+                    raise ValueError('Object-backup total exceeds safety limits')
+                key = f'originals/restore-verification/{verification}/{len(observed):08d}'
+                digest = upload_member(storage, source, member.size, key)
+                restored.append(key)
+                observed.append({'archive_name': member.name, 'size': member.size,
+                                 'sha256': digest})
+        if not manifest or manifest.get('format') != 'dtf-object-backup-v1':
+            raise ValueError('Object-backup manifest is missing or unsupported')
+        expected = manifest.get('objects')
+        if manifest.get('object_count') != len(observed) or manifest.get('total_bytes') != total:
+            raise ValueError('Object-backup summary does not match archive contents')
+        if not isinstance(expected, list) or len(expected) != len(observed):
+            raise ValueError('Object-backup manifest count does not match')
+        for actual, recorded, key in zip(observed, expected, restored):
+            for field in ('archive_name', 'size', 'sha256'):
+                if actual[field] != recorded.get(field):
+                    raise ValueError('Object-backup checksum manifest does not match')
+            restored_size, restored_hash = object_digest(storage, key)
+            if restored_size != actual['size'] or restored_hash != actual['sha256']:
+                raise ValueError('Restored verification object differs from archive')
+        print(f'PASS: {len(observed)} clean objects ({total} bytes) restored and hashed in an isolated prefix.')
+    finally:
+        for key in restored:
+            storage.client.delete_object(Bucket=storage.bucket, Key=key)
+    print('Removed temporary verification objects. Active artwork was untouched.')
+
+
+if __name__ == '__main__':
+    if len(sys.argv) != 2 or sys.argv[1] not in ('export', 'verify'):
+        raise SystemExit('usage: python -m local.storage_backup export|verify')
+    export_archive() if sys.argv[1] == 'export' else verify_archive()