chore(release): mosaic CLI 0.0.40

Publishes the merged fleet work to the npm CLI for the PoC fleet:
- onboarding-injection comms cheat-sheet + peer roster (#621)
- enhancer role + two-agent floor (#615)
- F4 Matrix connector abstraction + CS-API client (#617, #618)

npm publish only (packages/mosaic) — cheap under #619 path gating; no image builds.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RMoEx7hfdFGjUiCHuN1RRi

packages/mosaic/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@mosaicstack/mosaic",
-  "version": "0.0.39",
+  "version": "0.0.40",
   "repository": {
     "type": "git",
     "url": "https://git.mosaicstack.dev/mosaicstack/stack.git",