fix(logger): batch fix audit-logger, circular meta, and sync callers

- Make logAudit and closeAuditLogger synchronous (were async for no reason)
- Set audit-logger silent:true initially, enable on applyAuditConfig()
- Add try-catch for circular references in consoleFormat meta JSON
- Update all callers to remove unnecessary await/.catch() on sync functions
- Add comment to shared.ts explaining acceptable sync FS usage
- Fix audit-logger test for sync closeAuditLogger

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

src/main/services/auth/auth-application-service.ts

@@ -176,8 +176,6 @@ export class AuthApplicationService {
     actorId: string,
     payload: Parameters<typeof logAudit>[2]
   ): void {
-    logAudit(action, actorId, payload).catch((err) =>
-      log.warn('Failed to write audit log', { err })
-    )
+    logAudit(action, actorId, payload)
   }
 }