fix(lint): auto-fix ruff violations and tune lint rules

- Auto-fixed 4,496 lint issues (import sorting, modern syntax, etc.)
- Added ignore rules for patterns intentional in this codebase:
  E402 (late imports), E712 (SQLAlchemy filters), B904 (raise from),
  SIM108/SIM105/SIM117 (readability preferences)
- Added per-file ignores for tests and scripts
- Excluded broken scripts/rename_terminology.py (has curly quotes)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

scripts/check_letzshop_tracking.py

@@ -9,8 +9,9 @@ Example:
     python scripts/check_letzshop_tracking.py abc123 nvDv5RQEmCwbjo
 """
 
-import sys
 import json
+import sys
+
 import requests
 
 ENDPOINT = "https://letzshop.lu/graphql"
@@ -80,13 +81,13 @@ def get_tracking_info(api_key: str, target_shipment_id: str):
         if response.status_code != 200:
             print(f"Error: HTTP {response.status_code}")
             print(response.text)
-            return
+            return None
 
         data = response.json()
 
         if "errors" in data:
             print(f"GraphQL errors: {json.dumps(data['errors'], indent=2)}")
-            return
+            return None
 
         result = data.get("data", {}).get("shipments", {})
         nodes = result.get("nodes", [])
@@ -100,29 +101,29 @@ def get_tracking_info(api_key: str, target_shipment_id: str):
                 print("FOUND SHIPMENT!")
                 print(f"{'=' * 60}")
 
-                print(f"\n--- Shipment Info ---")
+                print("\n--- Shipment Info ---")
                 print(f"  ID: {shipment.get('id')}")
                 print(f"  Number: {shipment.get('number')}")
                 print(f"  State: {shipment.get('state')}")
 
-                print(f"\n--- Tracking Info ---")
-                tracking = shipment.get('tracking')
+                print("\n--- Tracking Info ---")
+                tracking = shipment.get("tracking")
                 if tracking:
                     print(f"  Tracking Number: {tracking.get('number')}")
                     print(f"  Tracking URL: {tracking.get('url')}")
-                    carrier = tracking.get('carrier', {})
+                    carrier = tracking.get("carrier", {})
                     if carrier:
                         print(f"  Carrier Name: {carrier.get('name')}")
                         print(f"  Carrier Code: {carrier.get('code')}")
                 else:
                     print("  No tracking object returned")
 
-                print(f"\n--- Order Info ---")
-                order = shipment.get('order', {})
+                print("\n--- Order Info ---")
+                order = shipment.get("order", {})
                 print(f"  Order Number: {order.get('number')}")
                 print(f"  Email: {order.get('email')}")
 
-                print(f"\n--- Raw Response ---")
+                print("\n--- Raw Response ---")
                 print(json.dumps(shipment, indent=2, default=str))
                 return shipment