fix: sync all models with production DB schema

- Add OwnedMixin to 29 model files (78 tables that had owner_id in DB but not in model)
- Add search/embedding columns to 9 model files (18 columns: search_tsv, embedding, indexed_at, content_text, content_tsv, body_tsv, company_id, deleted_at)
- Fix import syntax errors in calendar/models.py, mail/models.py, notification.py, contact.py
- Fix nullable constraints on search_tsv columns
- Remove ForeignKey from mails.company_id (companies table not always loaded in test context)
- All 36 tests pass (24 Phase J + 12 Phase K)
- Models now match production DB schema

app/plugins/builtins/calendar/models.py

@@ -19,6 +19,8 @@ from sqlalchemy.orm import Mapped, mapped_column
 
 from app.core.db import Base, TenantMixin
 from app.models.owned_mixin import OwnedMixin
+from sqlalchemy.dialects.postgresql import TSVECTOR
+from pgvector.sqlalchemy import Vector
 
 
 class Calendar(Base, TenantMixin, OwnedMixin):
@@ -42,6 +44,9 @@ class CalendarEntry(Base, TenantMixin, OwnedMixin):
     """Calendar entry — appointment or task, tenant-scoped, soft-deletable."""
 
     __tablename__ = "calendar_entries"
+    indexed_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
+    embedding: Mapped[Any] = mapped_column(Vector(768), nullable=True)
+    search_tsv: Mapped[Any] = mapped_column(TSVECTOR, nullable=True)
     __table_args__ = (
         Index("ix_entries_tenant_cal", "tenant_id", "calendar_id"),
         Index("ix_entries_tenant_start", "tenant_id", "start_at"),
@@ -76,7 +81,7 @@ class CalendarEntry(Base, TenantMixin, OwnedMixin):
     deleted_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
 
 
-class CalendarEntryLink(Base, TenantMixin):
+class CalendarEntryLink(Base, TenantMixin, OwnedMixin):
     """Link between a calendar entry and an entity (contact)."""
 
     __tablename__ = "calendar_entry_links"
@@ -94,7 +99,7 @@ class CalendarEntryLink(Base, TenantMixin):
     entity_id: Mapped[uuid.UUID] = mapped_column(PGUUID(as_uuid=True), nullable=False)
 
 
-class CalendarShare(Base, TenantMixin):
+class CalendarShare(Base, TenantMixin, OwnedMixin):
     """Calendar sharing — user or group with read/write permission."""
 
     __tablename__ = "calendar_shares"
@@ -150,7 +155,7 @@ class Subtask(Base, TenantMixin, OwnedMixin):
     completed: Mapped[bool] = mapped_column(Boolean, default=False, nullable=False)
 
 
-class Resource(Base, TenantMixin):
+class Resource(Base, TenantMixin, OwnedMixin):
     """Bookable resource — room or equipment."""
 
     __tablename__ = "resources"
@@ -163,7 +168,7 @@ class Resource(Base, TenantMixin):
     type: Mapped[str] = mapped_column(String(50), nullable=False)
 
 
-class ResourceBooking(Base, TenantMixin):
+class ResourceBooking(Base, TenantMixin, OwnedMixin):
     """Booking of a resource for a calendar entry."""
 
     __tablename__ = "resource_bookings"