feat(cli): 1.30.0 — per-session broker presence

flips CLAUDEMESH_SESSION_PRESENCE default to ON. With the broker side
already shipped (the session_hello handler from earlier in this sprint
A wave), every claudemesh launch now gets its own long-lived broker
presence row owned by the daemon and identified by a per-launch
ephemeral keypair vouched by the member's stable key. Two sessions in
the same cwd finally see each other in peer list — the symptom users
have been hitting since 1.28.0 dropped the bridge tier.

Bumps roadmap: 1.30.0 = presence (was queued for 1.30/wizard); the
launch-wizard refactor moves to 1.31.0, setup wizard to 1.32.0, the
mesh→workspace rename to 1.33.0. Verification smoke documented in the
1.30.0 changelog entry.

Rollback: CLAUDEMESH_SESSION_PRESENCE=0 (also accepts "false"/"off").

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/cli/package.json

@@ -1,6 +1,6 @@
 {
   "name": "claudemesh-cli",
-  "version": "1.29.0",
+  "version": "1.30.0",
   "description": "Peer mesh for Claude Code sessions — CLI + MCP server.",
   "keywords": [
     "claude-code",