Disable error ringing on registration failure

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/phone.ts

@@ -137,10 +137,10 @@ const startBaresip = async (phoneService: PhoneService, hook: GPIO.Input, ringer
     log.error("🐻 error:", errorMessage)
     phoneService.send({ type: "error", message: errorMessage })
 
-    for (let i = 0; i < 4; i++) {
-      await ring(ringer, 500)
-      await sleep(250)
-    }
+    // for (let i = 0; i < 4; i++) {
+    //   await ring(ringer, 500)
+    //   await sleep(250)
+    // }
 
     log("🔄 Retrying registration in 2 minutes...")
     await sleep(2 * 60 * 1000)