refactor: update module docstrings for clarity and consistency

backend/app/models/organization_invite_board_access.py

@@ -1,6 +1,8 @@
+"""Board access grants attached to pending organization invites."""
+
 from __future__ import annotations
 
-from datetime import datetime
+from datetime import datetime  # noqa: TCH003
 from uuid import UUID, uuid4
 
 from sqlalchemy import UniqueConstraint
@@ -11,6 +13,8 @@ from app.models.base import QueryModel
 
 
 class OrganizationInviteBoardAccess(QueryModel, table=True):
+    """Invite-specific board permissions applied after invite acceptance."""
+
     __tablename__ = "organization_invite_board_access"
     __table_args__ = (
         UniqueConstraint(
@@ -21,7 +25,10 @@ class OrganizationInviteBoardAccess(QueryModel, table=True):
     )
 
     id: UUID = Field(default_factory=uuid4, primary_key=True)
-    organization_invite_id: UUID = Field(foreign_key="organization_invites.id", index=True)
+    organization_invite_id: UUID = Field(
+        foreign_key="organization_invites.id",
+        index=True,
+    )
     board_id: UUID = Field(foreign_key="boards.id", index=True)
     can_read: bool = Field(default=True)
     can_write: bool = Field(default=False)