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>

docs/api/index.md

@@ -1,6 +1,6 @@
 # API Overview
 
-The Wizamart API provides comprehensive endpoints for managing products, shops, users, and marketplace imports. This section provides high-level guidance and concepts for working with our API.
+The Orion API provides comprehensive endpoints for managing products, shops, users, and marketplace imports. This section provides high-level guidance and concepts for working with our API.
 
 ## Interactive Documentation
 
@@ -15,7 +15,7 @@ For hands-on API exploration and testing, use our interactive documentation:
 
 ### Base URL
 ```
-Production: https://wizamart.com/api/v1
+Production: https://orion.lu/api/v1
 Development: http://localhost:8000/api/v1
 ```
 
@@ -182,4 +182,4 @@ X-RateLimit-Reset: 1640995200
 - **[Authentication Guide](authentication.md)** - Learn about API authentication
 - **[Error Handling](error-handling.md)** - Understanding API errors
 - **[Rate Limiting](rate-limiting.md)** - Rate limiting details
-- **[Interactive Docs](http://localhost:8000/docs)** - Try the API live
+- **[Interactive Docs](http://localhost:8000/docs)** - Try the API live