feat: implement n8n api integration endpoints and api key management

- Added api_keys table to database schema.

- Added API Key authentication middleware to express router.

- Created GET /api/integration/users endpoint for n8n to map agents.

- Created POST /api/integration/attendances endpoint to accept webhooks from n8n.

- Added UI in UserProfile (for Admins/Owners) to generate, view, and revoke API keys.

services/dataService.ts

@@ -176,6 +176,46 @@ export const deleteFunnelStage = async (id: string): Promise<boolean> => {
   }
 };
 
+// --- API Keys Functions ---
+export const getApiKeys = async (tenantId: string): Promise<any[]> => {
+  try {
+    const response = await fetch(`${API_URL}/api-keys?tenantId=${tenantId}`, {
+      headers: getHeaders()
+    });
+    if (!response.ok) throw new Error('Falha ao buscar chaves');
+    return await response.json();
+  } catch (error) {
+    console.error("API Error (getApiKeys):", error);
+    return [];
+  }
+};
+
+export const createApiKey = async (data: { name: string, tenantId: string }): Promise<any> => {
+  const response = await fetch(`${API_URL}/api-keys`, {
+    method: 'POST',
+    headers: getHeaders(),
+    body: JSON.stringify(data)
+  });
+  if (!response.ok) {
+    const error = await response.json();
+    throw new Error(error.error || 'Erro ao criar chave de API');
+  }
+  return await response.json();
+};
+
+export const deleteApiKey = async (id: string): Promise<boolean> => {
+  try {
+    const response = await fetch(`${API_URL}/api-keys/${id}`, {
+      method: 'DELETE',
+      headers: getHeaders()
+    });
+    return response.ok;
+  } catch (error) {
+    console.error("API Error (deleteApiKey):", error);
+    return false;
+  }
+};
+
 export const searchGlobal = async (query: string): Promise<{ members: User[], teams: any[], attendances: any[], organizations?: any[] }> => {
   try {
     const response = await fetch(`${API_URL}/search?q=${encodeURIComponent(query)}`, {