**fix(executor): update antigravity executor to enhance model metadata handling**

- Added additional metadata fields (`Name`, `Description`, `DisplayName`, `Version`) to `ModelInfo` struct initialization for better model representation.
- Removed unnecessary whitespace in the code.

internal/runtime/executor/antigravity_executor.go

@@ -366,11 +366,15 @@ func FetchAntigravityModels(ctx context.Context, auth *cliproxyauth.Auth, cfg *c
 			id = modelName2Alias(id)
 			if id != "" {
 				models = append(models, &registry.ModelInfo{
-					ID:      id,
+					ID:          id,
-					Object:  "model",
+					Name:        id,
-					Created: now,
+					Description: id,
-					OwnedBy: antigravityAuthType,
+					DisplayName: id,
-					Type:    antigravityAuthType,
+					Version:     id,
+					Object:      "model",
+					Created:     now,
+					OwnedBy:     antigravityAuthType,
+					Type:        antigravityAuthType,
 				})
 			}
 		}