app: fold the prober's validated capabilities into core-probe

traceroute.udp4 lands as TracerouteProbe: ICMP time-exceeded read off the
socket error queue via Os.recvmsg(MSG_ERRQUEUE) through the reflection
facade the prober validated on both devices - no root, no raw socket, and
the C-over-JNI shim stays dead. Emits the schema's TracerouteEvidence with
rtt_ns. OsAbi carries the hardcoded sockopt ABI numbers across, including
the measured fact that Os.getsockoptInt exists on neither device, so PMTU
must come from the errqueue, never getsockopt(IP_MTU).

local.mdns_inventory lands as MdnsInventoryProbe with both hardware-bought
lessons intact: the meta-query lies (0 results beside live services on both
devices), and 4s of listening misses what 10s catches.

App version 0.2.2.

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

echolot-app/app/build.gradle.kts

@@ -15,7 +15,7 @@ plugins {
 //
 // major*1_000_000 + minor*10_000 + patch*10 leaves room for 9 patch-level rebuilds (the trailing
 // digit) without disturbing the mapping, and stays inside the 2_100_000_000 ceiling until major 2100.
-val appVersionName = "0.2.1"
+val appVersionName = "0.2.2"
 
 fun versionCodeOf(semver: String): Int {
     val (major, minor, patch) = semver.substringBefore('-').split(".").map(String::toInt)