feat(antigravity): add weekly quota tracking and free-tier handling (#3892)

open-sse/providers/registry/antigravity.js

@@ -37,6 +37,7 @@ export default {
     },
     usage: {
       quotaApiUrl: `${ANTIGRAVITY_IDE_BASE_URL}/v1internal:fetchAvailableModels`,
+      quotaSummaryApiUrl: `${ANTIGRAVITY_IDE_BASE_URL}/v1internal:retrieveUserQuotaSummary`,
       loadProjectApiUrl: "https://cloudcode-pa.googleapis.com/v1internal:loadCodeAssist",
       tokenUrl: "https://oauth2.googleapis.com/token",
     },