feat(hosting): add HostWizard platform module and fix migration chain

- Add complete hosting module (models, routes, schemas, services, templates, migrations)
- Add HostWizard platform to init_production seed (code=hosting, domain=hostwizard.lu)
- Fix cms_002 migration down_revision to z_unique_subdomain_domain
- Fix prospecting_001 migration to chain after cms_002 (remove branch label)
- Add hosting/prospecting version_locations to alembic.ini
- Fix admin_services delete endpoint to use proper response model
- Add hostwizard.lu to deployment docs (DNS, Caddy, Cloudflare)
- Add hosting and prospecting user journey docs to mkdocs nav

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/modules/hosting/routes/api/admin.py

@@ -0,0 +1,21 @@
+# app/modules/hosting/routes/api/admin.py
+"""
+Hosting module admin API routes.
+
+Aggregates all admin hosting routes:
+- /sites/* - Hosted site CRUD and lifecycle
+- /sites/{id}/services/* - Client service management
+- /stats/* - Dashboard statistics
+"""
+
+from fastapi import APIRouter
+
+from .admin_services import router as admin_services_router
+from .admin_sites import router as admin_sites_router
+from .admin_stats import router as admin_stats_router
+
+router = APIRouter()
+
+router.include_router(admin_sites_router, tags=["hosting-sites"])
+router.include_router(admin_services_router, tags=["hosting-services"])
+router.include_router(admin_stats_router, tags=["hosting-stats"])