refactor: rename Wizamart to Orion across entire codebase

Replace all ~1,086 occurrences of Wizamart/wizamart/WIZAMART/WizaMart
with Orion/orion/ORION across 184 files. This includes database
identifiers, email addresses, domain references, R2 bucket names,
DNS prefixes, encryption salt, Celery app name, config defaults,
Docker configs, CI configs, documentation, seed data, and templates.

Renames homepage-wizamart.html template to homepage-orion.html.
Fixes duplicate file_pattern key in api.yaml architecture rule.

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

app/exceptions/handler.py

@@ -19,7 +19,7 @@ from fastapi.responses import JSONResponse, RedirectResponse
 from app.modules.enums import FrontendType
 from middleware.frontend_type import get_frontend_type
 
-from .base import WizamartException
+from .base import OrionException
 from .error_renderer import ErrorPageRenderer
 
 logger = logging.getLogger(__name__)
@@ -28,8 +28,8 @@ logger = logging.getLogger(__name__)
 def setup_exception_handlers(app):
     """Setup exception handlers for the FastAPI app."""
 
-    @app.exception_handler(WizamartException)
-    async def custom_exception_handler(request: Request, exc: WizamartException):
+    @app.exception_handler(OrionException)
+    async def custom_exception_handler(request: Request, exc: OrionException):
         """Handle custom exceptions with context-aware rendering."""
 
         # Special handling for auth errors on HTML page requests (redirect to login)