feat(cli): vault_get + deploy-time vault resolution

- Add vault_get wire message to fetch encrypted entries for client-side
  decryption
- Deploy handler resolves $vault: refs: fetches encrypted entries from
  broker, decrypts with mesh keypair locally, sends resolved env over TLS
- File-type vault entries encoded as __vault_file__:path:base64 for
  runner-side extraction

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/cli/package.json

@@ -1,6 +1,6 @@
 {
   "name": "claudemesh-cli",
-  "version": "0.8.4",
+  "version": "0.8.5",
   "description": "Claude Code MCP client for claudemesh — peer mesh messaging between Claude sessions.",
   "keywords": [
     "claude-code",