refactor: share route-level group gating decisions

src/plugin-sdk/googlechat.ts

@@ -73,7 +73,10 @@ export type { WizardPrompter } from "../wizard/prompts.js";
 export { resolveInboundRouteEnvelopeBuilderWithRuntime } from "./inbound-envelope.js";
 export { createScopedPairingAccess } from "./pairing-access.js";
 export { issuePairingChallenge } from "../pairing/pairing-challenge.js";
-export { resolveSenderScopedGroupPolicy } from "./group-access.js";
+export {
+  evaluateGroupRouteAccessForPolicy,
+  resolveSenderScopedGroupPolicy,
+} from "./group-access.js";
 export { extractToolSend } from "./tool-send.js";
 export { resolveWebhookPath } from "./webhook-path.js";
 export type { WebhookInFlightLimiter } from "./webhook-request-guards.js";