prober build 3: raise Shizuku bind window for slow first spawn; archive build-2 reports

Build-2 matrix (OnePlus 15/A16 + Lenovo TB330FU/A15) delivered the big
answer: traceroute.udp4 reads real hops via pure-Kotlin MSG_ERRQUEUE on
BOTH devices — the C-over-JNI shim is dead for Android 15+. Per-network
ICMP works as designed (phone ping6: cellular-only with topology
evidence). mDNS meta-query confirmed broken on both devices while
concrete types find real services — production must enumerate types.
Network finding: hudeWLAN RAs advertise a v6 default route but no global
prefix — the LAN's IPv6 is half-broken (nice dogfood case).

Tablet Shizuku bound 0/7 (binder alive, permission granted): first-spawn
dex extraction on slow storage suspected — bind window now 25s + one
retry. versionCode 3.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

echolot-prober/app/build.gradle.kts

@@ -15,7 +15,7 @@ android {
         targetSdk = 35
         // Bump versionCode on EVERY deployed change — it is shown on screen and lands in the
         // JSON report as proberBuild, so a report is attributable to an exact prober build.
-        versionCode = 2
+        versionCode = 3
         versionName = "0.1.0"
     }