refactor: update registry and main.py for module auto-discovery

- app/modules/registry.py: Use auto-discovery from discovery.py
- main.py: Integrate module route auto-discovery
- app/routes/vendor_pages.py: Remove routes now handled by modules

The registry now dynamically discovers modules from definition.py
files instead of hardcoded imports.

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

app/routes/vendor_pages.py

@@ -673,25 +673,10 @@ async def vendor_notifications_page(
 # ============================================================================
 # ANALYTICS
 # ============================================================================
-
-
-@router.get(
-    "/{vendor_code}/analytics", response_class=HTMLResponse, include_in_schema=False
-)
-async def vendor_analytics_page(
-    request: Request,
-    vendor_code: str = Path(..., description="Vendor code"),
-    current_user: User = Depends(get_current_vendor_from_cookie_or_header),
-    db: Session = Depends(get_db),
-):
-    """
-    Render analytics and reports page.
-    JavaScript loads analytics data via API.
-    """
-    return templates.TemplateResponse(
-        "vendor/analytics.html",
-        get_vendor_context(request, db, current_user, vendor_code),
-    )
+# NOTE: Analytics routes moved to self-contained module: app.modules.analytics.routes.pages.vendor
+# Routes are registered directly in main.py from the Analytics module
+# This includes:
+# - /{vendor_code}/analytics (dashboard)
 
 
 # ============================================================================