live: AMI-fed live state, /api/live WebSocket, dashboard and status dots

LiveState loads extension states and registered devices from Asterisk on
every AMI connect and follows ExtensionStatus/ContactStatus; the hub sends
a snapshot then deltas batched every 250 ms (devices for admins only),
pings every 30 s and closes unauthenticated sockets with 4401. The web UI
keeps one reconnecting socket in a zustand store, shows a Reconnecting
banner, a Dashboard (online, on a call, telephony engine) and status dots.

Fix: Asterisk 24 has no 'pjsip reload'; reload with
'module reload res_pjsip.so'. AMI errors now carry the CLI output.

Milestone check, automated: call-test.ts registers two baresip phones and
holds a 30 s call with RTP both ways (pnpm test:asterisk); the recorded
session drives the live-state tests. scripts/e2e/m2-live.mjs runs api +
Asterisk + phones + browser on a private Docker network: a new extension
is live in Asterisk in ~1.3 s, the dashboard shows 2/2 online and red dots
during the call.

Task: M2-T6

package.json

@@ -15,7 +15,7 @@
     "lint": "eslint . && prettier --check .",
     "format": "prettier --write .",
     "typecheck": "pnpm -r typecheck",
-    "test:asterisk": "node apps/api/test/asterisk/load-golden.mjs"
+    "test:asterisk": "node apps/api/test/asterisk/load-golden.mjs && node --conditions=source apps/api/test/asterisk/call-test.ts"
   },
   "devDependencies": {
     "@eslint/js": "^10.0.1",