fix(validation): add run-eval/eval-only fields to agentic matrix entries

The eval pipeline injects run-eval and eval-only into agentic entries,
but SingleNodeAgenticMatrixEntry and MultiNodeAgenticMatrixEntry had
extra='forbid' without those fields, causing validation to reject them.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: seungrokj

utils/matrix_logic/validation.py

@@ -333,6 +333,8 @@ class MultiNodeAgenticMatrixEntry(BaseModel):
     exp_name: str = Field(alias=Fields.EXP_NAME.value)
     disagg: bool
     scenario_type: str = Field(alias=Fields.SCENARIO_TYPE.value)
+    run_eval: bool = Field(alias=Fields.RUN_EVAL.value, default=False)
+    eval_only: bool = Field(alias=Fields.EVAL_ONLY.value, default=False)
 
     @model_validator(mode='after')
     def validate_worker_hardware_pair(self):