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>

README.md

@@ -34,7 +34,7 @@ This FastAPI application provides a complete ecommerce backend solution designed
 ### Project Structure
 
 ```
-wizamart/
+orion/
 ├── main.py                     # FastAPI application entry point
 ├── app/
 │   ├── core/
@@ -179,8 +179,8 @@ make qa
 
 ```bash
 # Clone the repository
-git clone <wizamart-repo>
-cd wizamart-repo
+git clone <orion-repo>
+cd orion-repo
 
 # Create virtual environment
 python -m venv venv
@@ -447,7 +447,7 @@ PROD002,"Super Gadget","A fantastic gadget",19.99,EUR,GadgetInc,9876543210987,Am
 - `POST /api/v1/marketplace/import-product` - Start CSV import
 - `GET /api/v1/marketplace/import-status/{job_id}` - Check import status
 - `GET /api/v1/marketplace/import-jobs` - List import jobs
-- 
+-
 ### Inventory Endpoints
 - `POST /api/v1/inventory` - Set inventory quantity
 - `POST /api/v1/inventory/add` - Add to inventory
@@ -700,7 +700,7 @@ make help
 
 This will display all available commands organized by category:
 - **Setup**: Installation and environment setup
-- **Development**: Development servers and workflows  
+- **Development**: Development servers and workflows
 - **Documentation**: Documentation building and deployment
 - **Testing**: Various test execution options
 - **Code Quality**: Formatting, linting, and quality checks
@@ -734,4 +734,4 @@ This will display all available commands organized by category:
 - **Health Check**: http://localhost:8000/health
 - **Version Info**: http://localhost:8000/
 
-For issues and feature requests, please create an issue in the repository.
+For issues and feature requests, please create an issue in the repository.