feat: add validation and logging for unsupported LLM config override keys

Author: plfavreau

minitap/mobile_use/config.py

@@ -244,10 +244,19 @@ def get_default_minitap_llm_config() -> LLMConfig | None:
 
 
 def deep_merge_llm_config(default: LLMConfig, override: dict) -> LLMConfig:
-    def _deep_merge_dict(base: dict, extra: dict):
+    def _deep_merge_dict(base: dict, extra: dict, path: str = ""):
         for key, value in extra.items():
-            if isinstance(value, dict):
-                _deep_merge_dict(base[key], value)
+            current_path = f"{path}.{key}" if path else key
+            
+            if key not in base:
+                logger.warning(
+                    f"Unsupported config key '{current_path}' found in override config. "
+                    f"Ignoring this key."
+                )
+                continue
+            
+            if isinstance(value, dict) and isinstance(base[key], dict):
+                _deep_merge_dict(base[key], value, current_path)
             else:
                 base[key] = value