refactor: translate all docstrings and comments to English (STRICT ENGLISH POLICY complete)

backend/routers/operations.py

@@ -15,7 +15,7 @@ def check_in_item(
     db: Session = Depends(get_db),
     current_user: auth.TokenData = Depends(auth.get_current_user)
 ):
-    """[C-01] Check-in item — doar utilizatori autentificati. [M-02] user_id din token."""
+    """[C-01] Check-in item — only for authenticated users. [M-02] user_id from token."""
     if op.quantity <= 0:
         raise HTTPException(status_code=400, detail="Quantity must be greater than zero")
 
@@ -26,7 +26,7 @@ def check_in_item(
     # Update quantity
     item.quantity += op.quantity
 
-    # Create Mandatory Audit Log — [M-02] user_id din token
+    # Create Mandatory Audit Log — [M-02] user_id from token
     audit = models.AuditLog(
         user_id=current_user.sub,
         action="CHECK_IN",
@@ -45,7 +45,7 @@ def check_out_item(
     db: Session = Depends(get_db),
     current_user: auth.TokenData = Depends(auth.get_current_user)
 ):
-    """[C-01] Check-out item — doar utilizatori autentificati."""
+    """[C-01] Check-out item — only for authenticated users."""
     if op.quantity <= 0:
         raise HTTPException(status_code=400, detail="Quantity must be greater than zero")
 
@@ -78,7 +78,7 @@ def trash_item(
     db: Session = Depends(get_db),
     current_user: auth.TokenData = Depends(auth.get_current_user)
 ):
-    """[C-01] Trash item — doar utilizatori autentificati."""
+    """[C-01] Trash item — only for authenticated users."""
     if op.quantity <= 0:
         raise HTTPException(status_code=400, detail="Quantity must be greater than zero")
 
@@ -112,7 +112,7 @@ def bulk_check_out(
     db: Session = Depends(get_db),
     current_user: auth.TokenData = Depends(auth.get_current_user)
 ):
-    """[C-01] Bulk check-out — doar utilizatori autentificati."""
+    """[C-01] Bulk check-out — only for authenticated users."""
     results = {"success": [], "errors": []}
 
     for op in bulk_op.items:
@@ -151,7 +151,7 @@ def bulk_sync(
     db: Session = Depends(get_db),
     current_user: auth.TokenData = Depends(auth.get_current_user)
 ):
-    """[C-01] Bulk sync offline operations — doar utilizatori autentificati."""
+    """[C-01] Bulk sync offline operations — only for authenticated users."""
     results = {"success": [], "errors": []}
 
     for op in payload.operations:
@@ -206,7 +206,7 @@ def get_logs(
     db: Session = Depends(get_db),
     current_user: auth.TokenData = Depends(auth.get_current_user)
 ):
-    """[C-01] Lista audit logs — doar utilizatori autentificati."""
+    """[C-01] Audit logs list — only for authenticated users."""
     # Join with User to get the username directly
     logs_with_users = db.query(
         models.AuditLog.id,