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/hosted_site.py

@@ -0,0 +1,81 @@
+# app/modules/hosting/models/hosted_site.py
+"""
+HostedSite model - links a Store to a Prospect and tracks the POC → live lifecycle.
+
+Lifecycle: draft → poc_ready → proposal_sent → accepted → live → suspended | cancelled
+"""
+
+import enum
+
+from sqlalchemy import Column, DateTime, Enum, ForeignKey, Integer, String, Text
+from sqlalchemy.orm import relationship
+
+from app.core.database import Base
+from models.database.base import TimestampMixin
+
+
+class HostedSiteStatus(str, enum.Enum):
+    DRAFT = "draft"
+    POC_READY = "poc_ready"
+    PROPOSAL_SENT = "proposal_sent"
+    ACCEPTED = "accepted"
+    LIVE = "live"
+    SUSPENDED = "suspended"
+    CANCELLED = "cancelled"
+
+
+class HostedSite(Base, TimestampMixin):
+    """Represents a hosted website linking a Store to a Prospect."""
+
+    __tablename__ = "hosted_sites"
+
+    id = Column(Integer, primary_key=True, index=True)
+    store_id = Column(
+        Integer,
+        ForeignKey("stores.id", ondelete="CASCADE"),
+        nullable=False,
+        unique=True,
+    )
+    prospect_id = Column(
+        Integer,
+        ForeignKey("prospects.id", ondelete="SET NULL"),
+        nullable=True,
+    )
+    status = Column(
+        Enum(HostedSiteStatus),
+        nullable=False,
+        default=HostedSiteStatus.DRAFT,
+    )
+
+    # Denormalized for dashboard display
+    business_name = Column(String(255), nullable=False)
+    contact_name = Column(String(255), nullable=True)
+    contact_email = Column(String(255), nullable=True)
+    contact_phone = Column(String(50), nullable=True)
+
+    # Lifecycle timestamps
+    proposal_sent_at = Column(DateTime, nullable=True)
+    proposal_accepted_at = Column(DateTime, nullable=True)
+    went_live_at = Column(DateTime, nullable=True)
+
+    # Proposal
+    proposal_notes = Column(Text, nullable=True)
+
+    # Denormalized from StoreDomain
+    live_domain = Column(String(255), nullable=True, unique=True)
+
+    # Internal notes
+    internal_notes = Column(Text, nullable=True)
+
+    # Relationships
+    store = relationship("Store", backref="hosted_site", uselist=False)
+    prospect = relationship("Prospect", backref="hosted_sites")
+    client_services = relationship(
+        "ClientService",
+        back_populates="hosted_site",
+        cascade="all, delete-orphan",
+    )
+
+    @property
+    def display_name(self) -> str:
+        return self.business_name or f"Site #{self.id}"