chore(release): bump @mosaicstack/mosaic 0.0.37 -> 0.0.38

Custom Pi harness: native heartbeat (turn-accurate busy/ok) + model self-report
+ model-callable mosaic_mission_status tool (#602); HB reader/writer consistency
(#599); agent watch viewer-leak + workdir test settle-race fixes (#601).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RMoEx7hfdFGjUiCHuN1RRi

packages/mosaic/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@mosaicstack/mosaic",
-  "version": "0.0.37",
+  "version": "0.0.38",
   "repository": {
     "type": "git",
     "url": "https://git.mosaicstack.dev/mosaicstack/stack.git",