fix verify-configs

Author: srivatsankrishnan

src/cloudai/workloads/megatron_bridge/megatron_bridge.py

@@ -40,8 +40,8 @@ class MegatronBridgeCmdArgs(CmdArgs):
     detach: Optional[bool] = Field(default=None)
 
     # Model/task
-    model_name: str = Field(default="")
-    model_size: str = Field(default="")
+    model_name: str = Field(min_length=1)
+    model_size: str = Field(min_length=1)
     domain: str = Field(default="llm")
     task: str = Field(default="pretrain")
     compute_dtype: str = Field(default="bf16")

tests/slurm_command_gen_strategy/test_megatron_bridge_slurm_command_gen_strategy.py

@@ -85,7 +85,7 @@ def cmd_gen(self, slurm_system: SlurmSystem, test_run: TestRun) -> MegatronBridg
 
     def test_hf_token_empty_is_rejected_by_schema(self) -> None:
         with pytest.raises(Exception, match=r"hf_token"):
-            MegatronBridgeCmdArgs.model_validate({"hf_token": ""})
+            MegatronBridgeCmdArgs.model_validate({"hf_token": "", "model_name": "qwen3", "model_size": "30b_a3b"})
 
     def test_git_repos_can_pin_megatron_bridge_commit(self) -> None:
         args = MegatronBridgeCmdArgs(hf_token="dummy_token", model_name="qwen3", model_size="30b_a3b")