feat(agent): add sse run/resume endpoints with auth

backend/src/v1/agent/router.py

@@ -3,17 +3,33 @@ from __future__ import annotations
 from typing import Annotated
 
 from fastapi import APIRouter, Depends
+from fastapi.responses import StreamingResponse
 
 from v1.agent.dependencies import get_agent_service
-from v1.agent.schemas import AgentChatRunRequest, AgentChatRunResponse
+from v1.agent.schemas import RunAgentInput
 from v1.agent.service import AgentChatService
 
 router = APIRouter(prefix="/agent", tags=["agent"])
 
 
-@router.post("", response_model=AgentChatRunResponse)
-async def run_agent_chat(
-    payload: AgentChatRunRequest,
+@router.post("/runs")
+async def create_run(
+    input_data: RunAgentInput,
     service: Annotated[AgentChatService, Depends(get_agent_service)],
-) -> AgentChatRunResponse:
-    return await service.run(payload)
+) -> StreamingResponse:
+    return StreamingResponse(
+        service.stream_run(input_data),
+        media_type="text/event-stream",
+    )
+
+
+@router.post("/runs/{run_id}/resume")
+async def resume_run(
+    run_id: str,
+    input_data: RunAgentInput,
+    service: Annotated[AgentChatService, Depends(get_agent_service)],
+) -> StreamingResponse:
+    return StreamingResponse(
+        service.stream_resume(run_id, input_data),
+        media_type="text/event-stream",
+    )