chore(test-isolation): broaden runtime ignore list for live fusion app paths

Live fusion instances running on a shared HOME write to tasks/, messages/,
memory-insights.md, test-cache.json, HEARTBEAT.md, kb.db.backup-*, and
fusion.db.pre-* snapshots; none were in the runtime ignore list, so the
script flagged them as test-driven mutations and failed merge build
verification. Recursion in collectFusionSignature only filters via top-level
matches, so adding these top-level patterns short-circuits descent into
live-app dirs.

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

.changeset/test-isolation-live-app-noise.md

@@ -0,0 +1,10 @@
+---
+"@runfusion/fusion": patch
+---
+
+Extend `scripts/check-test-isolation.mjs` runtime ignore list to cover live
+fusion app paths that previously tripped the merge-time check when a fusion
+instance was running on the same HOME during tests: `tasks/`, `messages/`,
+`memory-insights.md`, `test-cache.json`, `HEARTBEAT.md`, `kb.db.backup-*`,
+and `fusion.db.pre-*` snapshots. Tests still must not write to these paths;
+the filter only suppresses noise from a concurrently-running app.

scripts/check-test-isolation.mjs

@@ -67,13 +67,18 @@ const RUNTIME_IGNORE_PATTERNS = [
   /^cache(?:[/\\]|$)/,
   /^config\.json$/,
   /^fusion-central\.db(?:-wal|-shm|-journal)?$/,
-  /^fusion\.db(?:-wal|-shm|-journal)?(?:\.backup-[\w-]+)?$/,
+  /^fusion\.db(?:-wal|-shm|-journal)?(?:\.backup-[\w-]+)?(?:\.pre-[\w-]+)?$/,
   /^archive\.db(?:-wal|-shm|-journal)?(?:\.backup-[\w-]+)?$/,
+  /^kb\.db(?:-wal|-shm|-journal)?(?:\.backup-[\w-]+)?$/,
   /^activity-log\.jsonl$/,
   /^settings\.json$/,
   /^logs(?:[/\\]|$)/,
   /^tasks(?:[/\\]|$)/,
   /^memory(?:[/\\]|$)/,
+  /^messages(?:[/\\]|$)/,
+  /^memory-insights\.md$/,
+  /^test-cache\.json$/,
+  /^HEARTBEAT\.md$/,
   /^MEMORY\.md$/,
   /^DREAMS\.md$/,
   /^\d{4}-\d{2}-\d{2}\.md$/,