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/schemas/__init__.py

@@ -0,0 +1,32 @@
+# app/modules/hosting/schemas/__init__.py
+from app.modules.hosting.schemas.client_service import (
+    ClientServiceCreate,
+    ClientServiceDeleteResponse,
+    ClientServiceResponse,
+    ClientServiceUpdate,
+)
+from app.modules.hosting.schemas.hosted_site import (
+    AcceptProposalRequest,
+    GoLiveRequest,
+    HostedSiteCreate,
+    HostedSiteDetailResponse,
+    HostedSiteListResponse,
+    HostedSiteResponse,
+    HostedSiteUpdate,
+    SendProposalRequest,
+)
+
+__all__ = [
+    "HostedSiteCreate",
+    "HostedSiteUpdate",
+    "HostedSiteResponse",
+    "HostedSiteDetailResponse",
+    "HostedSiteListResponse",
+    "SendProposalRequest",
+    "AcceptProposalRequest",
+    "GoLiveRequest",
+    "ClientServiceCreate",
+    "ClientServiceUpdate",
+    "ClientServiceResponse",
+    "ClientServiceDeleteResponse",
+]