chore(release): v1.34.20 — test build for auto-updater pipeline

Throwaway release to validate the macOS Tauri Updater end-to-end:
v1.34.19 (installed manually) → check() → latest.json → download +
install → relaunch. Contains no actual changes. CHANGELOG entry asks
users to ignore it; will be deleted after the test.

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

src-tauri/tauri.conf.json

@@ -1,7 +1,7 @@
 {
   "$schema": "https://schema.tauri.app/config/2",
   "productName": "Psysonic",
-  "version": "1.34.19",
+  "version": "1.34.20",
   "identifier": "dev.psysonic.player",
   "build": {
     "beforeDevCommand": "npm run dev",