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/deployment/hetzner-server-setup.md

@@ -1,6 +1,6 @@
 # Hetzner Cloud Server Setup
 
-Complete step-by-step guide for deploying Wizamart on a Hetzner Cloud VPS.
+Complete step-by-step guide for deploying Orion on a Hetzner Cloud VPS.
 
 !!! info "Server Details"
     - **Provider**: Hetzner Cloud
@@ -326,7 +326,7 @@ openssl rand -hex 16   # For database password
 | Variable | How to Generate / What to Set |
 |---|---|
 | `DEBUG` | `False` |
-| `DATABASE_URL` | `postgresql://wizamart_user:YOUR_DB_PW@db:5432/wizamart_db` |
+| `DATABASE_URL` | `postgresql://orion_user:YOUR_DB_PW@db:5432/orion_db` |
 | `JWT_SECRET_KEY` | Output of `openssl rand -hex 32` |
 | `ADMIN_PASSWORD` | Strong password |
 | `USE_CELERY` | `true` |
@@ -386,7 +386,7 @@ docker compose --profile full exec -e PYTHONPATH=/app api python scripts/seed/se
 
 | Data | Count |
 |---|---|
-| Admin users | 1 (`admin@wizamart.com`) |
+| Admin users | 1 (`admin@orion.lu`) |
 | Platforms | 3 (OMS, Main, Loyalty+) |
 | Admin settings | 15 |
 | Subscription tiers | 4 (Essential, Professional, Business, Enterprise) |
@@ -774,7 +774,7 @@ sudo systemctl status gitea-runner
 
 | Service | Internal Port | External Port | Domain (via Caddy) |
 |---|---|---|---|
-| Wizamart API | 8000 | 8001 | `api.wizard.lu` |
+| Orion API | 8000 | 8001 | `api.wizard.lu` |
 | Main Platform | 8000 | 8001 | `wizard.lu` |
 | OMS Platform | 8000 | 8001 | `oms.lu` (TODO) |
 | Loyalty+ Platform | 8000 | 8001 | `loyaltyplus.lu` (TODO) |
@@ -794,7 +794,7 @@ sudo systemctl status gitea-runner
 ├── gitea/
 │   └── docker-compose.yml       # Gitea + PostgreSQL
 ├── apps/
-│   └── orion/                   # Wizamart application
+│   └── orion/                   # Orion application
 │       ├── .env                 # Production environment
 │       ├── docker-compose.yml   # App stack (API, DB, Redis, Celery)
 │       ├── logs/                # Application logs