release(mosaic): bump @mosaicstack/mosaic 0.0.30 -> 0.0.31

Publishes the framework fixes merged since 0.0.30 that were never version-bumped:
- #524 Gitea/Woodpecker wrapper hardening rollup (pr-merge api_url, pr-create body safety, repo args, woodpecker creds)
- #529 thin-core prompt diet
- #533 inter-agent tmux comms tooling (tools/tmux/agent-send.sh + send-message.sh)

Deployed framework on hosts is stale at 0.0.30; this release lets install.sh propagate the fixes.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

packages/mosaic/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@mosaicstack/mosaic",
-  "version": "0.0.30",
+  "version": "0.0.31",
   "repository": {
     "type": "git",
     "url": "https://git.mosaicstack.dev/mosaicstack/stack.git",