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/__init__.py

@@ -0,0 +1,36 @@
+# app/modules/hosting/__init__.py
+"""
+Hosting Module - Web hosting, domains, email, and website building.
+
+This is a self-contained module providing:
+- POC website lifecycle management (draft → live pipeline)
+- Client service tracking (domains, email, SSL, hosting, maintenance)
+- Integration with prospecting module for prospect → merchant conversion
+- Dashboard with KPIs, status charts, and renewal alerts
+
+Module Structure:
+- models/ - Database models (hosted_site, client_service)
+- services/ - Business logic (lifecycle, service management, stats)
+- schemas/ - Pydantic DTOs
+- routes/ - API and page routes (admin + public POC viewer)
+- tasks/ - Celery background tasks for expiry checks
+- exceptions.py - Module-specific exceptions
+"""
+
+
+def __getattr__(name: str):
+    """Lazy import module components to avoid circular imports."""
+    if name == "hosting_module":
+        from app.modules.hosting.definition import hosting_module
+
+        return hosting_module
+    if name == "get_hosting_module_with_routers":
+        from app.modules.hosting.definition import (
+            get_hosting_module_with_routers,
+        )
+
+        return get_hosting_module_with_routers
+    raise AttributeError(f"module {__name__!r} has no attribute {name!r}")
+
+
+__all__ = ["hosting_module", "get_hosting_module_with_routers"]