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/models/__init__.py

@@ -0,0 +1,20 @@
+# app/modules/hosting/models/__init__.py
+from app.modules.hosting.models.client_service import (
+    BillingPeriod,
+    ClientService,
+    ClientServiceStatus,
+    ServiceType,
+)
+from app.modules.hosting.models.hosted_site import (
+    HostedSite,
+    HostedSiteStatus,
+)
+
+__all__ = [
+    "HostedSite",
+    "HostedSiteStatus",
+    "ClientService",
+    "ServiceType",
+    "ClientServiceStatus",
+    "BillingPeriod",
+]