feat: add boards and tasks management endpoints

backend/app/schemas/agents.py

@@ -0,0 +1,36 @@
+from __future__ import annotations
+
+from datetime import datetime
+from uuid import UUID
+
+from sqlmodel import SQLModel
+
+
+class AgentBase(SQLModel):
+    name: str
+    status: str = "online"
+
+
+class AgentCreate(AgentBase):
+    pass
+
+
+class AgentUpdate(SQLModel):
+    name: str | None = None
+    status: str | None = None
+
+
+class AgentRead(AgentBase):
+    id: UUID
+    openclaw_session_id: str | None = None
+    last_seen_at: datetime
+    created_at: datetime
+    updated_at: datetime
+
+
+class AgentHeartbeat(SQLModel):
+    status: str | None = None
+
+
+class AgentHeartbeatCreate(AgentHeartbeat):
+    name: str