v1.7.5: block_quic config (#213) + auto-refresh releases/ folder

- Adds `block_quic = true` config flag for client-side QUIC drop.
  SOCKS5 UDP relay refuses UDP/443 datagrams; browsers fall back to
  TCP/HTTPS through the relay. Opt-in. Thanks @w0l4i
- Workflow now auto-refreshes the in-repo releases/ folder on each
  release tag, so Iranian users behind GitHub-Releases-page filtering
  can download via Code → Download ZIP. Practice was started before
  v1.1.0 then dropped; resumed at user request.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

android/app/build.gradle.kts

@@ -14,8 +14,8 @@ android {
         applicationId = "com.therealaleph.mhrv"
         minSdk = 24 // Android 7.0 — covers 99%+ of live devices.
         targetSdk = 34
-        versionCode = 149
-        versionName = "1.7.4"
+        versionCode = 150
+        versionName = "1.7.5"
 
         // Ship all four mainstream Android ABIs:
         //   - arm64-v8a      — 95%+ of real-world Android phones since 2019