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/getting-started/cms-quick-start.md

@@ -43,11 +43,11 @@ All CMS pages are accessible on your shop frontend:
 
 ```
 # For domain/subdomain access
-https://wizamart.shop/about
+https://orion.shop/about
 https://fashionhub.store/contact
 
 # For path-based access
-http://localhost:8000/store/wizamart/faq
+http://localhost:8000/store/orion/faq
 http://localhost:8000/stores/fashionhub/shipping
 ```
 
@@ -113,13 +113,13 @@ When a customer visits `/about`:
 - Title: "About Our Platform"
 - Content: Generic platform description
 
-**WizaMart Override:**
+**Orion Override:**
 - Slug: `about`
-- Title: "About WizaMart"
-- Content: WizaMart-specific content
+- Title: "About Orion"
+- Content: Orion-specific content
 
 **Result:**
-- `wizamart.shop/about` → Shows WizaMart custom version
+- `orion.shop/about` → Shows Orion custom version
 - `fashionhub.store/about` → Shows platform default (no override)
 
 ## Footer Navigation