Pocket Poster 3.3.0: worse_query port for iOS 26-27.2

- Replace bad_query with forcequitOS/worse_query (App Group based)
- Read the App Group from the code signature entitlements
- Add pathleak container enumeration and iOS 27 system container lookup
- Route descriptor/CarPlay writes through worse_query
- Add sign_personal.sh and POCKET_POSTER_SELFTEST diagnostics
- Keep bad_query as an iOS 26 fallback

Pocket Poster/Pocket_PosterApp.swift

@@ -84,5 +84,11 @@ struct Pocket_PosterApp: App {
     init() {
         // clear the videos cache
         try? FileManager.default.removeItem(at: SymHandler.getDocumentsDirectory().appendingPathComponent("Videos", conformingTo: .directory))
+
+        if SelfTest.isEnabled {
+            DispatchQueue.global(qos: .userInitiated).async {
+                SelfTest.run()
+            }
+        }
     }
 }