feat(core-shared): extend audit action enum with consent and restriction types

Adds CONSENT_GRANT, CONSENT_WITHDRAW, RESTRICT, UNRESTRICT to the
AuditAction closed enum per GDPR Art. 7 and Art. 18 requirements.

core-consent and core-dsr optional cores (Epic B Stories 03/06) emit
these action types via core-audit's IAuditLog channel; the values must
exist in core-shared's enum before either optional core can be built.
No change to IAuditLog's interface surface — new values flow through
AuditEntry.action automatically.

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

coverage/summary.json

@@ -1,6 +1,6 @@
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+  "generatedAt": "2026-05-19T10:16:15.209Z",
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