fix(ios audio): stop the speaker<->BT oscillation; single override, no re-force

v1.1.1's route observer re-forced speaker on every change, and WebKit re-added Bluetooth
each time -> the audio flapped speaker<->BT many times/sec (telemetry: dozens of route
flips from 3 taps), which read as 'sound doesn't switch'. WKWebView won't let the app
hold the built-in speaker over an active BT device. So: one override per tap, observer
only REPORTS the output (no fighting). Also stop dimming the iOS button (it's a live
output indicator, not on/off; the dim read as 'disabled' on BT). Probe now carries the
native marker so we can confirm the binary. plugin v1.1.2-stable, web batch150.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

mobile/plugins/audio-route/package.json

@@ -1,6 +1,6 @@
 {
   "name": "audio-route",
-  "version": "1.1.1",
+  "version": "1.1.2",
   "description": "iOS earpiece/speaker audio route toggle for Biz Connect",
   "main": "dist/plugin.cjs.js",
   "module": "dist/esm/index.js",