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/modules/tenancy/exceptions.py

@@ -13,9 +13,9 @@ from app.exceptions.base import (
     BusinessLogicException,
     ConflictException,
     ExternalServiceException,
+    OrionException,
     ResourceNotFoundException,
     ValidationException,
-    WizamartException,
 )
 
 # =============================================================================
@@ -116,7 +116,7 @@ class UserAlreadyExistsException(ConflictException):
 # =============================================================================
 
 
-class PlatformNotFoundException(WizamartException):
+class PlatformNotFoundException(OrionException):
     """Raised when a platform is not found."""
 
     def __init__(self, code: str):
@@ -128,7 +128,7 @@ class PlatformNotFoundException(WizamartException):
         )
 
 
-class PlatformInactiveException(WizamartException):  # noqa: MOD-025
+class PlatformInactiveException(OrionException):  # noqa: MOD-025
     """Raised when trying to access an inactive platform."""
 
     def __init__(self, code: str):
@@ -140,7 +140,7 @@ class PlatformInactiveException(WizamartException):  # noqa: MOD-025
         )
 
 
-class PlatformUpdateException(WizamartException):  # noqa: MOD-025
+class PlatformUpdateException(OrionException):  # noqa: MOD-025
     """Raised when platform update fails."""
 
     def __init__(self, code: str, reason: str):