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>

main.py

@@ -1,6 +1,6 @@
 # main.py
 """
-Wizamart FastAPI Application
+Orion FastAPI Application
 
 Multi-tenant e-commerce marketplace platform with:
 - Three deployment modes (subdomain, custom domain, path-based)
@@ -51,7 +51,7 @@ if settings.sentry_dsn:
         # Send PII data (emails, usernames) - set to False if privacy is critical
         send_default_pii=True,
         # Release version for tracking deployments
-        release=f"wizamart@{settings.version}",
+        release=f"orion@{settings.version}",
     )
     logging.getLogger(__name__).info(
         f"Sentry initialized for environment: {settings.sentry_environment}"
@@ -459,7 +459,7 @@ for route_info in storefront_page_routes:
 async def store_root_path(
     store_code: str, request: Request, db: Session = Depends(get_db)
 ):
-    """Handle store root path (e.g., /stores/wizamart/)"""
+    """Handle store root path (e.g., /stores/orion/)"""
     # Store should already be in request.state from middleware
     store = getattr(request.state, "store", None)
     platform = getattr(request.state, "platform", None)
@@ -515,7 +515,7 @@ async def store_root_path(
 # - /platforms/loyalty/            → Loyalty platform homepage
 #
 # URL Structure (Production - domain-based):
-# - wizamart.lu/                   → Main marketing site
+# - orion.lu/                   → Main marketing site
 # - oms.lu/                        → OMS platform homepage
 # - loyalty.lu/                    → Loyalty platform homepage
 # ============================================================================