feat: Add use_profile_image and detailed token usage fields to generation models.

adapters/google_adapter.py

@@ -131,9 +131,17 @@ class GoogleAdapter:
             else:
                 logger.warning("No images text generated from parts")
 
+            input_tokens = 0
+            output_tokens = 0
+            if response.usage_metadata:
+                input_tokens = response.usage_metadata.prompt_token_count
+                output_tokens = response.usage_metadata.candidates_token_count
+
             metrics = {
                 "api_execution_time_seconds": api_duration,
-                "token_usage": token_usage
+                "token_usage": token_usage,
+                "input_token_usage": input_tokens,
+                "output_token_usage": output_tokens
             }
             return generated_images, metrics