feat: add board group models and update related interfaces

backend/app/models/__init__.py

@@ -1,6 +1,8 @@
 from app.models.activity_events import ActivityEvent
 from app.models.agents import Agent
 from app.models.approvals import Approval
+from app.models.board_group_memory import BoardGroupMemory
+from app.models.board_groups import BoardGroup
 from app.models.board_memory import BoardMemory
 from app.models.board_onboarding import BoardOnboardingSession
 from app.models.boards import Board
@@ -14,8 +16,10 @@ __all__ = [
     "ActivityEvent",
     "Agent",
     "Approval",
+    "BoardGroupMemory",
     "BoardMemory",
     "BoardOnboardingSession",
+    "BoardGroup",
     "Board",
     "Gateway",
     "TaskDependency",

backend/app/models/board_group_memory.py

@@ -0,0 +1,21 @@
+from __future__ import annotations
+
+from datetime import datetime
+from uuid import UUID, uuid4
+
+from sqlalchemy import JSON, Column
+from sqlmodel import Field, SQLModel
+
+from app.core.time import utcnow
+
+
+class BoardGroupMemory(SQLModel, table=True):
+    __tablename__ = "board_group_memory"
+
+    id: UUID = Field(default_factory=uuid4, primary_key=True)
+    board_group_id: UUID = Field(foreign_key="board_groups.id", index=True)
+    content: str
+    tags: list[str] | None = Field(default=None, sa_column=Column(JSON))
+    is_chat: bool = Field(default=False, index=True)
+    source: str | None = None
+    created_at: datetime = Field(default_factory=utcnow)

backend/app/models/board_groups.py

@@ -0,0 +1,20 @@
+from __future__ import annotations
+
+from datetime import datetime
+from uuid import UUID, uuid4
+
+from sqlmodel import Field
+
+from app.core.time import utcnow
+from app.models.tenancy import TenantScoped
+
+
+class BoardGroup(TenantScoped, table=True):
+    __tablename__ = "board_groups"
+
+    id: UUID = Field(default_factory=uuid4, primary_key=True)
+    name: str
+    slug: str = Field(index=True)
+    description: str | None = None
+    created_at: datetime = Field(default_factory=utcnow)
+    updated_at: datetime = Field(default_factory=utcnow)

backend/app/models/boards.py

@@ -17,6 +17,7 @@ class Board(TenantScoped, table=True):
     name: str
     slug: str = Field(index=True)
     gateway_id: UUID | None = Field(default=None, foreign_key="gateways.id", index=True)
+    board_group_id: UUID | None = Field(default=None, foreign_key="board_groups.id", index=True)
     board_type: str = Field(default="goal", index=True)
     objective: str | None = None
     success_metrics: dict[str, object] | None = Field(default=None, sa_column=Column(JSON))