feat(core-audit): TraceIdEnrichingAuditLog decorator for OTel correlation

Decorator implementing IAuditLog that auto-populates AuditEntry.correlationId
from the active OTel span via currentTraceId(). Caller-supplied correlationId
always wins (explicit > implicit). eraseSubject passes through unmodified.
Adds @opentelemetry/{api,sdk-trace-base,context-async-hooks} as devDeps for
test infrastructure.

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

packages/core-audit/package.json

@@ -25,9 +25,15 @@
     "payload": "^3.0.0"
   },
   "peerDependenciesMeta": {
-    "payload": { "optional": true }
+    "payload": {
+      "optional": true
+    }
   },
   "devDependencies": {
+    "@opentelemetry/api": "^1.9.0",
+    "@opentelemetry/api-logs": "^0.55.0",
+    "@opentelemetry/context-async-hooks": "^1.28.0",
+    "@opentelemetry/sdk-trace-base": "^1.27.0",
     "@repo/core-eslint": "workspace:*",
     "@repo/core-testing": "workspace:*",
     "@repo/core-typescript": "workspace:*",