Implement llm-connect ADHOC diagnostics

llm_connect/gemini.py

@@ -9,6 +9,7 @@ from llm_connect.adapter import LLMAdapter
 from llm_connect.models import RunConfig, LLMResponse
 from llm_connect.config import resolve_api_key, find_project_root
 from llm_connect._http import post_json
+from llm_connect._payload import merge_gemini_model_params
 from llm_connect.exceptions import LLMConfigurationError
 
 _DEFAULT_MODEL = "gemini-2.5-flash"
@@ -74,6 +75,8 @@ class GeminiAdapter(LLMAdapter):
                 "maxOutputTokens": config.max_tokens,
             },
         }
+        if config.model_params:
+            merge_gemini_model_params(payload, config.model_params)
 
         url = f"{_API_BASE}/models/{model}:generateContent?key={self._api_key}"