feat(core-consent): add PayloadConsent, RecordingConsent and DI binders

Implements the Payload-backed IConsent that reads/writes users.consentState
and emits CONSENT_GRANT/CONSENT_WITHDRAW audit entries via injected auditLog.
Adds RecordingConsent test double in core-testing for unit-test injection.
Adds bindProductionConsent/bindDevSeedConsent DI binders and InMemoryConsent
for dev/seed contexts. Contract tests cover grant/withdraw/isGranted round-trip,
audit entry shape, metadata persistence (bannerVersion/policyVersion/method),
and getCategories reflection of state.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/core-consent/src/index.ts

@@ -2,7 +2,17 @@ export type {
   ConsentCategory,
   ConsentState,
   UserConsentState,
+  ConsentGrantMeta,
 } from "./consent-types";
 export type { IConsent } from "./consent.interface";
 export type { ConsentChecked } from "./with-consent";
 export { withConsent } from "./with-consent";
+export { InMemoryConsent } from "./in-memory-consent";
+export { PayloadConsent } from "./payload-consent";
+export { CONSENT_SYMBOLS } from "./di/symbols";
+export {
+  bindProductionConsent,
+  type BindProductionConsentOpts,
+  type ConsentFactory,
+} from "./di/bind-production";
+export { bindDevSeedConsent } from "./di/bind-dev-seed";