Fix model-controller mismatches and routing issues

- ticket: add user_id, priority, category fields; fix _serialize_ticket -> _serialize
- package: fix is_active -> active (Odoo auto-filter), remove invalid entity_id filter
- walkthrough: add sequence field; fix controller to use name/content instead of title/steps
- users: fix encoach_user_type -> encoach_type, encoach_entity_id -> entity_rel_ids.entity_id
- generation: use EncoachGenerationService class instead of nonexistent ORM model,
  fix /api/exam/level/ route conflict (separate GET and POST URLs)

Made-with: Cursor

encoach_api/controllers/tickets.py

@@ -19,7 +19,7 @@ class TicketsController(EncoachMixin, http.Controller):
                 return self._error_response('Unauthorized', 401)
 
             domain = []
-            user_type = getattr(user, 'encoach_user_type', 'student')
+            user_type = getattr(user, 'encoach_type', 'student')
             if user_type not in ('admin', 'developer'):
                 domain.append(('user_id', '=', user.id))
 
@@ -33,7 +33,7 @@ class TicketsController(EncoachMixin, http.Controller):
             records = Ticket.search(domain, offset=offset, limit=limit, order='create_date desc')
 
             return self._json_response({
-                'tickets': [self._serialize_ticket(t) for t in records],
+                'tickets': [self._serialize(t) for t in records],
                 'total': total,
                 'page': page,
                 'limit': limit,
@@ -67,7 +67,7 @@ class TicketsController(EncoachMixin, http.Controller):
                 vals['category'] = body['category']
 
             ticket = request.env['encoach.ticket'].sudo().create(vals)
-            return self._json_response(self._serialize_ticket(ticket), status=201)
+            return self._json_response(self._serialize(ticket), status=201)
         except Exception:
             _logger.exception("Create ticket error")
             return self._error_response('Internal server error', 500)
@@ -101,7 +101,7 @@ class TicketsController(EncoachMixin, http.Controller):
             if vals:
                 ticket.write(vals)
 
-            return self._json_response(self._serialize_ticket(ticket))
+            return self._json_response(self._serialize(ticket))
         except Exception:
             _logger.exception("Update ticket error")
             return self._error_response('Internal server error', 500)