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/frontend/storefront/architecture.md

@@ -185,16 +185,16 @@ The shop frontend supports THREE access methods:
    - Links: /shop/products, /shop/about, /shop/contact
 
 2. **Subdomain** (Production)
-   URL: https://wizamart.letzshop.com/shop/products
+   URL: https://orion.letzshop.com/shop/products
    - Store uses platform subdomain
    - base_url = "/"
    - Links: /shop/products, /shop/about, /shop/contact
 
 3. **Path-Based** (Development/Testing)
-   URL: http://localhost:8000/stores/wizamart/shop/products
+   URL: http://localhost:8000/stores/orion/shop/products
    - Store accessed via path prefix
-   - base_url = "/stores/wizamart/"
-   - Links: /stores/wizamart/shop/products, /stores/wizamart/shop/about
+   - base_url = "/stores/orion/"
+   - Links: /stores/orion/shop/products, /stores/orion/shop/about
 
 ⚠️ CRITICAL: All template links MUST use {{ base_url }}shop/ prefix
 
@@ -476,10 +476,10 @@ Example Endpoints:
   GET    /api/v1/shop/content-pages/{slug}  ← CMS page content
 
 How Store Context Works:
-  1. Browser makes API call from shop page (e.g., /stores/wizamart/shop/products)
-  2. Browser automatically sends Referer header: http://localhost:8000/stores/wizamart/shop/products
+  1. Browser makes API call from shop page (e.g., /stores/orion/shop/products)
+  2. Browser automatically sends Referer header: http://localhost:8000/stores/orion/shop/products
   3. StoreContextMiddleware extracts store from Referer header
-  4. Middleware sets request.state.store = <Store: wizamart>
+  4. Middleware sets request.state.store = <Store: orion>
   5. API endpoint accesses store: store = request.state.store
   6. No store_id needed in URL!
 
@@ -1285,8 +1285,8 @@ How It Works:
 4. Error template renders with correct base_url
 5. Links work for all access methods:
    - Domain: customshop.com → base_url = "/"
-   - Subdomain: wizamart.platform.com → base_url = "/"
-   - Path: localhost/stores/wizamart/ → base_url = "/stores/wizamart/"
+   - Subdomain: orion.platform.com → base_url = "/"
+   - Path: localhost/stores/orion/ → base_url = "/stores/orion/"
 
 Benefits:
   ✅ Error pages work correctly regardless of access method