Implement Phase 1 audit logging

Add centralized admin action logger and integrate logging for:
- Alert resolutions (system, rate limit, grouped)
- Role grants/revokes in UserRoleManager
- Incident creation/acknowledgement/resolution
- Moderation lock overrides

Includes file updates and usage across relevant components to ensure consistent audit trails.

src/components/moderation/ModerationQueue.tsx

@@ -262,7 +262,23 @@ export const ModerationQueue = forwardRef<ModerationQueueRef, ModerationQueuePro
   
   // Superuser force release lock
   const handleSuperuserReleaseLock = useCallback(async (submissionId: string) => {
+    // Fetch lock details before releasing
+    const { data: submission } = await supabase
+      .from('content_submissions')
+      .select('assigned_to, locked_until')
+      .eq('id', submissionId)
+      .single();
+    
     await queueManager.queue.superuserReleaseLock(submissionId);
+    
+    // Log to audit trail
+    const { logAdminAction } = await import('@/lib/adminActionAuditHelpers');
+    await logAdminAction('moderation_lock_force_released', {
+      submission_id: submissionId,
+      original_moderator_id: submission?.assigned_to,
+      original_locked_until: submission?.locked_until,
+    });
+    
     // Refresh locks count and queue
     setActiveLocksCount(prev => Math.max(0, prev - 1));
     queueManager.refresh();