refactor: remove additional dead exports and unused actions

Remove buildFontUrl, measureText, uncached, invalidateCache, fetchJsonWithFlareSolver, upsertPermission, deletePermission, bulkImportPermissions, clearAllPermissions, bulkDeletePermissions, bulkDeletePhotos, userReplyTicket, closeTicketByUser. Update staff-smoke-contract test for bulkDeletePhotos removal.

src/lib/cached-db.ts

@@ -44,15 +44,6 @@ export async function cachedQuery<T>(
 	return result;
 }
 
-/** Invalidate cache keys matching a glob pattern. */
-export async function invalidateCache(pattern: string): Promise<number> {
-	if (!isRedisAvailable()) return 0;
-	const r = redis;
-	if (!r) return 0;
-	const keys = await r.keys(pattern);
-	return keys.length > 0 ? r.del(...keys) : 0;
-}
-
 /** Invalidate a single cache key immediately. */
 export async function invalidateKey(key: string): Promise<number> {
 	if (!isRedisAvailable()) return 0;