feat(managed-ne): add bulk import template download with device_type reference sheet

Expose GET /v1/managed-ne/import/template and a workbench button to download xlsx/csv templates listing supported Netmiko device types.

Co-authored-by: Cursor <cursoragent@cursor.com>

netx_api/managed_ne_router.py

@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 from fastapi import APIRouter, Depends, File, HTTPException, Query, UploadFile
+from fastapi.responses import Response
 from sqlalchemy.orm import Session
 
 from .db import get_db
@@ -9,6 +10,7 @@ from .ne_connect import schedule_connect_tests
 from .ne_crypto import credentials_configured
 from .ne_schemas import ConnectTestRequest, ManagedNeCreate, ManagedNeUpdate
 from .ne_service import (
+    build_managed_ne_import_template,
     create_managed_ne,
     delete_managed_ne,
     get_managed_ne,
@@ -70,6 +72,16 @@ def api_delete_managed_ne(ne_id: str, db: Session = Depends(get_db)):
     return delete_managed_ne(db, ne_id)
 
 
+@router.get("/import/template")
+def api_managed_ne_import_template(format: str = Query(default="xlsx")):
+    filename, payload, media_type = build_managed_ne_import_template(format)
+    return Response(
+        content=payload,
+        media_type=media_type,
+        headers={"content-disposition": f'attachment; filename="{filename}"'},
+    )
+
+
 @router.post("/import")
 async def api_import_managed_ne(file: UploadFile = File(...), db: Session = Depends(get_db)):
     content = await file.read()