feat(automations): wire agent_task to multi_agent_chat with auto-approve loop

surfsense_backend/app/automations/registries/actions/agent_task.py

@@ -2,31 +2,18 @@
 
 from __future__ import annotations
 
-from typing import Any
-
+from app.automations.actions.agent_task import build_handler
 from app.automations.schemas.actions import AgentTaskActionParams
 
 from .store import register_action
-from .types import ActionContext, ActionDefinition, ActionHandler
-
-
-def _build_handler(ctx: ActionContext) -> ActionHandler:
-    """Bind run/session context to the agent_task handler. Real wiring lands in Phase 4b."""
-    del ctx  # ignored by the stub; real handler will consume it
-
-    async def handle(params: dict[str, Any]) -> dict[str, Any]:
-        AgentTaskActionParams.model_validate(params)
-        return {"status": "stubbed"}
-
-    return handle
-
+from .types import ActionDefinition
 
 AGENT_TASK_ACTION = ActionDefinition(
     type="agent_task",
     name="Agent task",
-    description="Run an agent task with a scoped tool allowlist.",
+    description="Run a multi_agent_chat turn from an automation step.",
     params_schema=AgentTaskActionParams.model_json_schema(),
-    build_handler=_build_handler,
+    build_handler=build_handler,
 )
 
 register_action(AGENT_TASK_ACTION)