refactor: standardize runtime annotation types across multiple files

backend/app/models/activity_events.py

@@ -2,7 +2,7 @@
 
 from __future__ import annotations
 
-from datetime import datetime  # noqa: TCH003
+from datetime import datetime
 from uuid import UUID, uuid4
 
 from sqlmodel import Field
@@ -10,6 +10,8 @@ from sqlmodel import Field
 from app.core.time import utcnow
 from app.models.base import QueryModel
 
+RUNTIME_ANNOTATION_TYPES = (datetime,)
+
 
 class ActivityEvent(QueryModel, table=True):
     """Discrete activity event tied to tasks and agents."""

backend/app/models/agents.py

@@ -2,7 +2,7 @@
 
 from __future__ import annotations
 
-from datetime import datetime  # noqa: TCH003
+from datetime import datetime
 from typing import Any
 from uuid import UUID, uuid4
 
@@ -12,6 +12,8 @@ from sqlmodel import Field
 from app.core.time import utcnow
 from app.models.base import QueryModel
 
+RUNTIME_ANNOTATION_TYPES = (datetime,)
+
 
 class Agent(QueryModel, table=True):
     """Agent configuration and lifecycle state persisted in the database."""

backend/app/models/approvals.py

@@ -2,7 +2,7 @@
 
 from __future__ import annotations
 
-from datetime import datetime  # noqa: TCH003
+from datetime import datetime
 from uuid import UUID, uuid4
 
 from sqlalchemy import JSON, Column
@@ -11,6 +11,8 @@ from sqlmodel import Field
 from app.core.time import utcnow
 from app.models.base import QueryModel
 
+RUNTIME_ANNOTATION_TYPES = (datetime,)
+
 
 class Approval(QueryModel, table=True):
     """Approval request and decision metadata for gated operations."""

backend/app/models/board_group_memory.py

@@ -2,7 +2,7 @@
 
 from __future__ import annotations
 
-from datetime import datetime  # noqa: TCH003
+from datetime import datetime
 from uuid import UUID, uuid4
 
 from sqlalchemy import JSON, Column
@@ -11,6 +11,8 @@ from sqlmodel import Field
 from app.core.time import utcnow
 from app.models.base import QueryModel
 
+RUNTIME_ANNOTATION_TYPES = (datetime,)
+
 
 class BoardGroupMemory(QueryModel, table=True):
     """Persisted memory items associated with a board group."""

backend/app/models/board_groups.py

@@ -2,7 +2,7 @@
 
 from __future__ import annotations
 
-from datetime import datetime  # noqa: TCH003
+from datetime import datetime
 from uuid import UUID, uuid4
 
 from sqlmodel import Field
@@ -10,6 +10,8 @@ from sqlmodel import Field
 from app.core.time import utcnow
 from app.models.tenancy import TenantScoped
 
+RUNTIME_ANNOTATION_TYPES = (datetime,)
+
 
 class BoardGroup(TenantScoped, table=True):
     """Logical grouping container for boards within an organization."""

backend/app/models/board_memory.py

@@ -2,7 +2,7 @@
 
 from __future__ import annotations
 
-from datetime import datetime  # noqa: TCH003
+from datetime import datetime
 from uuid import UUID, uuid4
 
 from sqlalchemy import JSON, Column
@@ -11,6 +11,8 @@ from sqlmodel import Field
 from app.core.time import utcnow
 from app.models.base import QueryModel
 
+RUNTIME_ANNOTATION_TYPES = (datetime,)
+
 
 class BoardMemory(QueryModel, table=True):
     """Persisted memory item attached directly to a board."""

backend/app/models/board_onboarding.py

@@ -2,7 +2,7 @@
 
 from __future__ import annotations
 
-from datetime import datetime  # noqa: TCH003
+from datetime import datetime
 from uuid import UUID, uuid4
 
 from sqlalchemy import JSON, Column
@@ -11,6 +11,8 @@ from sqlmodel import Field
 from app.core.time import utcnow
 from app.models.base import QueryModel
 
+RUNTIME_ANNOTATION_TYPES = (datetime,)
+
 
 class BoardOnboardingSession(QueryModel, table=True):
     """Persisted onboarding conversation and draft goal data for a board."""

backend/app/models/boards.py

@@ -2,7 +2,7 @@
 
 from __future__ import annotations
 
-from datetime import datetime  # noqa: TCH003
+from datetime import datetime
 from uuid import UUID, uuid4
 
 from sqlalchemy import JSON, Column
@@ -11,6 +11,8 @@ from sqlmodel import Field
 from app.core.time import utcnow
 from app.models.tenancy import TenantScoped
 
+RUNTIME_ANNOTATION_TYPES = (datetime,)
+
 
 class Board(TenantScoped, table=True):
     """Primary board entity grouping tasks, agents, and goal metadata."""

backend/app/models/gateways.py

@@ -2,7 +2,7 @@
 
 from __future__ import annotations
 
-from datetime import datetime  # noqa: TCH003
+from datetime import datetime
 from uuid import UUID, uuid4
 
 from sqlmodel import Field
@@ -10,6 +10,8 @@ from sqlmodel import Field
 from app.core.time import utcnow
 from app.models.base import QueryModel
 
+RUNTIME_ANNOTATION_TYPES = (datetime,)
+
 
 class Gateway(QueryModel, table=True):
     """Configured external gateway endpoint and authentication settings."""

backend/app/models/organization_board_access.py

@@ -2,7 +2,7 @@
 
 from __future__ import annotations
 
-from datetime import datetime  # noqa: TCH003
+from datetime import datetime
 from uuid import UUID, uuid4
 
 from sqlalchemy import UniqueConstraint
@@ -11,6 +11,8 @@ from sqlmodel import Field
 from app.core.time import utcnow
 from app.models.base import QueryModel
 
+RUNTIME_ANNOTATION_TYPES = (datetime,)
+
 
 class OrganizationBoardAccess(QueryModel, table=True):
     """Member-specific board permissions within an organization."""

backend/app/models/organization_invite_board_access.py

@@ -2,7 +2,7 @@
 
 from __future__ import annotations
 
-from datetime import datetime  # noqa: TCH003
+from datetime import datetime
 from uuid import UUID, uuid4
 
 from sqlalchemy import UniqueConstraint
@@ -11,6 +11,8 @@ from sqlmodel import Field
 from app.core.time import utcnow
 from app.models.base import QueryModel
 
+RUNTIME_ANNOTATION_TYPES = (datetime,)
+
 
 class OrganizationInviteBoardAccess(QueryModel, table=True):
     """Invite-specific board permissions applied after invite acceptance."""

backend/app/models/organization_invites.py

@@ -2,7 +2,7 @@
 
 from __future__ import annotations
 
-from datetime import datetime  # noqa: TCH003
+from datetime import datetime
 from uuid import UUID, uuid4
 
 from sqlalchemy import UniqueConstraint
@@ -11,6 +11,8 @@ from sqlmodel import Field
 from app.core.time import utcnow
 from app.models.base import QueryModel
 
+RUNTIME_ANNOTATION_TYPES = (datetime,)
+
 
 class OrganizationInvite(QueryModel, table=True):
     """Invitation record granting prospective organization access."""

backend/app/models/organization_members.py

@@ -2,7 +2,7 @@
 
 from __future__ import annotations
 
-from datetime import datetime  # noqa: TCH003
+from datetime import datetime
 from uuid import UUID, uuid4
 
 from sqlalchemy import UniqueConstraint
@@ -11,6 +11,8 @@ from sqlmodel import Field
 from app.core.time import utcnow
 from app.models.base import QueryModel
 
+RUNTIME_ANNOTATION_TYPES = (datetime,)
+
 
 class OrganizationMember(QueryModel, table=True):
     """Membership row linking a user to an organization and permissions."""

backend/app/models/organizations.py

@@ -2,7 +2,7 @@
 
 from __future__ import annotations
 
-from datetime import datetime  # noqa: TCH003
+from datetime import datetime
 from uuid import UUID, uuid4
 
 from sqlalchemy import UniqueConstraint
@@ -11,6 +11,8 @@ from sqlmodel import Field
 from app.core.time import utcnow
 from app.models.base import QueryModel
 
+RUNTIME_ANNOTATION_TYPES = (datetime,)
+
 
 class Organization(QueryModel, table=True):
     """Top-level organization tenant record."""

backend/app/models/task_dependencies.py

@@ -2,7 +2,7 @@
 
 from __future__ import annotations
 
-from datetime import datetime  # noqa: TCH003
+from datetime import datetime
 from uuid import UUID, uuid4
 
 from sqlalchemy import CheckConstraint, UniqueConstraint
@@ -11,6 +11,8 @@ from sqlmodel import Field
 from app.core.time import utcnow
 from app.models.tenancy import TenantScoped
 
+RUNTIME_ANNOTATION_TYPES = (datetime,)
+
 
 class TaskDependency(TenantScoped, table=True):
     """Directed dependency edge between two tasks in the same board."""

backend/app/models/task_fingerprints.py

@@ -2,7 +2,7 @@
 
 from __future__ import annotations
 
-from datetime import datetime  # noqa: TCH003
+from datetime import datetime
 from uuid import UUID, uuid4
 
 from sqlmodel import Field
@@ -10,6 +10,8 @@ from sqlmodel import Field
 from app.core.time import utcnow
 from app.models.base import QueryModel
 
+RUNTIME_ANNOTATION_TYPES = (datetime,)
+
 
 class TaskFingerprint(QueryModel, table=True):
     """Hashed task-content fingerprint associated with a board and task."""

backend/app/models/tasks.py

@@ -2,7 +2,7 @@
 
 from __future__ import annotations
 
-from datetime import datetime  # noqa: TCH003
+from datetime import datetime
 from uuid import UUID, uuid4
 
 from sqlmodel import Field
@@ -10,6 +10,8 @@ from sqlmodel import Field
 from app.core.time import utcnow
 from app.models.tenancy import TenantScoped
 
+RUNTIME_ANNOTATION_TYPES = (datetime,)
+
 
 class Task(TenantScoped, table=True):
     """Board-scoped task entity with ownership, status, and timing fields."""