Added DEFAULT_MAX_AGE_HOURS constant to proxy route

server/routes/proxy.js

@@ -14,6 +14,9 @@ const { spawn } = require('child_process');
 const ffmpegPath = require('ffmpeg-static');
 const { Readable } = require('stream');
 
+// Default cache max age in hours
+const DEFAULT_MAX_AGE_HOURS = 24;
+
 // Helper to get formatted category list from DB
 function getCategoriesFromDb(sourceId, type, includeHidden = false) {
     const db = getDb();