feat: Add JWT auth and nomenclature sync to data-entry-app

Integrate shared JWT authentication into data-entry-app:
- Add Oracle pool initialization for auth service
- Add AuthenticationMiddleware to protect API routes
- Update all receipt endpoints to use CurrentUser from JWT
- Add shared auth router (/api/auth/login, /api/auth/refresh)

Add nomenclature synchronization feature:
- Create SQLite models for synced suppliers, local suppliers, and cash registers
- Add nomenclature router with sync triggers and CRUD endpoints
- Add sync service for Oracle → SQLite nomenclature data
- Update nomenclature_service to use synced SQLite data with fallbacks

Create shared frontend components:
- Add shared/frontend/ with LoginView.vue, auth store factory, login.css
- Integrate shared login and auth into data-entry-app frontend
- Add axios-based API service with token refresh interceptor

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

shared/auth/routes.py

@@ -116,6 +116,9 @@ def create_auth_router(
             logger.info(f"Successful login for user {login_data.username}")
             return token_response
             
+        except HTTPException:
+            # Re-raise HTTP exceptions as-is (e.g., 401 for invalid credentials)
+            raise
         except AuthenticationError as e:
             logger.error(f"Authentication error for user {login_data.username}: {str(e)}")
             raise HTTPException(