refactor: migrate products and vendor_products to module auto-discovery

- Move admin/products.py to marketplace module as admin_products.py
  (marketplace product catalog browsing)
- Move admin/vendor_products.py to catalog module as admin.py
  (vendor catalog management)
- Move vendor/products.py to catalog module as vendor.py
  (vendor's own product catalog)
- Update marketplace admin router to include products routes
- Update catalog module routes/api/__init__.py with lazy imports
- Remove legacy imports from admin and vendor API init files

All product routes now auto-discovered via module system.

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

app/modules/marketplace/routes/api/admin.py

@@ -2,43 +2,33 @@
 """
 Marketplace module admin routes.
 
-This module wraps the existing admin marketplace routes and adds
-module-based access control. Routes are re-exported from the
-original location with the module access dependency.
+This module aggregates all marketplace admin routers into a single router
+for auto-discovery. Routes are defined in dedicated files with module-based
+access control.
 
 Includes:
-- /marketplace/* - Marketplace monitoring
+- /products/* - Marketplace product catalog browsing
+- /marketplace-import-jobs/* - Marketplace import job monitoring
 - /letzshop/* - Letzshop integration
 """
 
-import importlib
+from fastapi import APIRouter
 
-from fastapi import APIRouter, Depends
+from .admin_products import admin_products_router
+from .admin_marketplace import admin_marketplace_router
+from .admin_letzshop import admin_letzshop_router
 
-from app.api.deps import require_module_access
+# Create aggregate router for auto-discovery
+# The router is named 'admin_router' for auto-discovery compatibility
+admin_router = APIRouter()
 
-# Import original routers using importlib to avoid circular imports
-# (direct import triggers app.api.v1.admin.__init__.py which imports us)
-_marketplace_module = importlib.import_module("app.api.v1.admin.marketplace")
-_letzshop_module = importlib.import_module("app.api.v1.admin.letzshop")
-marketplace_original_router = _marketplace_module.router
-letzshop_original_router = _letzshop_module.router
+# Include marketplace product catalog routes
+admin_router.include_router(admin_products_router)
 
-# Create module-aware router for marketplace
-admin_router = APIRouter(
-    prefix="/marketplace",
-    dependencies=[Depends(require_module_access("marketplace"))],
-)
+# Include marketplace import jobs routes
+admin_router.include_router(admin_marketplace_router)
 
-# Re-export all routes from the original marketplace module
-for route in marketplace_original_router.routes:
-    admin_router.routes.append(route)
+# Include letzshop routes
+admin_router.include_router(admin_letzshop_router)
 
-# Create separate router for letzshop integration
-admin_letzshop_router = APIRouter(
-    prefix="/letzshop",
-    dependencies=[Depends(require_module_access("marketplace"))],
-)
-
-for route in letzshop_original_router.routes:
-    admin_letzshop_router.routes.append(route)
+__all__ = ["admin_router"]