fix: ModuleNotFound error should be caught when dependencies of LocalEvalService are not installed

Once caught we publish the clarifying message to install the extra. PiperOrigin-RevId: 785999033

Author: ankursharmas

src/google/adk/cli/fast_api.py

@@ -675,23 +675,24 @@ async def run_eval(
  app_name: str, eval_set_id: str, req: RunEvalRequest
  ) -> list[RunEvalResult]:
  """Runs an eval given the details in the eval request."""
- from ..evaluation.local_eval_service import LocalEvalService
- from .cli_eval import _collect_eval_results
- from .cli_eval import _collect_inferences
-
  # Create a mapping from eval set file to all the evals that needed to be
  # run.
- eval_set = eval_sets_manager.get_eval_set(app_name, eval_set_id)
+ try:
+ from ..evaluation.local_eval_service import LocalEvalService
+ from .cli_eval import _collect_eval_results
+ from .cli_eval import _collect_inferences
 
- if not eval_set:
- raise HTTPException(
- status_code=400, detail=f"Eval set `{eval_set_id}` not found."
- )
+ eval_set = eval_sets_manager.get_eval_set(app_name, eval_set_id)
 
- root_agent = agent_loader.load_agent(app_name)
+ if not eval_set:
+ raise HTTPException(
+ status_code=400, detail=f"Eval set `{eval_set_id}` not found."
+ )
+
+ root_agent = agent_loader.load_agent(app_name)
+
+ eval_case_results = []
 
- eval_case_results = []
- try:
  eval_service = LocalEvalService(
  root_agent=root_agent,
  eval_sets_manager=eval_sets_manager,