Add monitor API endpoint for getting vertex builds

src/backend/langflow/api/v1/monitor.py

@@ -0,0 +1,20 @@
+from typing import Optional
+
+from fastapi import APIRouter, Depends, Query
+
+from langflow.services.deps import get_monitor_service
+from langflow.services.monitor.schema import VertexBuildModel
+from langflow.services.monitor.service import MonitorService
+
+router = APIRouter(prefix="/monitor", tags=["Monitor"])
+
+
+# Get vertex_builds data from the monitor service
+@router.get("/builds", response_model=list[VertexBuildModel])
+async def get_vertex_builds(
+    flow_id: Optional[str] = Query(None),
+    vertex_id: Optional[str] = Query(None),
+    valid: Optional[bool] = Query(None),
+    monitor_service: MonitorService = Depends(get_monitor_service),
+):
+    return monitor_service.get_vertex_builds(flow_id=flow_id, vertex_id=vertex_id, valid=valid)