feat(daemon): sense runtime — worker, IPC, migrations, peer isolation

Implements the Sense observation engine runtime per RFC-001:

- IPC types: discriminated union for parent↔worker messages
- sense-runtime: openSenseDb (WAL), openPeerDb (readonly), runMigrations,
  loadComputeFn, executeCompute with Result<T> error handling
- sense-worker: CLI bootstrap, reads nerve.yaml, inits per-sense DB,
  builds peer map, enters IPC event loop
- examples/cpu-usage: sample sense with Drizzle schema + migration
- 15 unit tests covering migrations, DB ops, compute, peer isolation

小橘 🍊（NEKO Team）

biome.json

@@ -1,7 +1,7 @@
 {
   "$schema": "https://biomejs.dev/schemas/1.9.0/schema.json",
   "files": {
-    "ignore": ["**/dist/**"]
+    "ignore": ["**/dist/**", "false/**", "**/node_modules/**"]
   },
   "organizeImports": {
     "enabled": true