test(broker): port test suite from claude-intercom to drizzle/postgres

21 integration tests (14 broker behavior + 7 path encoding), all
passing in ~1s against a real Postgres (claudemesh_test database on
the dev container).

Test infrastructure:
- apps/broker/vitest.config.ts extends @turbostarter/vitest-config/base
- tests/helpers.ts: setupTestMesh() creates a fresh mesh + 2 members
  per test with a unique slug, returns cleanup function that cascades
  the delete. cleanupAllTestMeshes() as an afterAll safety net.
- Mesh isolation in broker logic means tests don't interfere even when
  they share a database — no per-test TRUNCATE needed.

Ported behavior tests (broker.test.ts, 14 tests):
- hook flips status + queued "next" messages unblock
- "now"-priority bypasses the working gate
- DND is sacred (hooks cannot unset it)
- hook source stays fresh through jsonl refresh
- source decays to jsonl when hook signal goes stale
- isHookFresh freshness window + source-type rules
- TTL sweep flips stuck "working" → idle
- TTL sweep leaves DND alone
- first-turn race: hook fired pre-connect stashed in pending_status
- applyPendingHookStatus picks newest matching entry
- expired pending entries are ignored on connect
- broadcast targetSpec (*) reaches all members
- pubkey mismatch → message not drained
- mesh isolation: peer in mesh X doesn't drain from mesh Y

Ported encoding tests (encoding.test.ts, 7 tests):
- macOS, Linux, Windows path encoding first-candidate correctness
- Roberto's H:\Claude → H--Claude regression test (2026-04-04)
- Candidate dedup, drive-stripped fallback, leading-dash fallback

How to run: from apps/broker,
  DATABASE_URL="postgresql://.../claudemesh_test" pnpm test

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

pnpm-lock.yaml

@@ -139,6 +139,9 @@ importers:
       '@turbostarter/tsconfig':
         specifier: workspace:*
         version: link:../../tooling/typescript
+      '@turbostarter/vitest-config':
+        specifier: workspace:*
+        version: link:../../tooling/vitest
       '@types/libsodium-wrappers':
         specifier: 0.7.14
         version: 0.7.14
@@ -154,6 +157,9 @@ importers:
       typescript:
         specifier: 'catalog:'
         version: 5.9.3
+      vitest:
+        specifier: 'catalog:'
+        version: 4.0.14(@opentelemetry/api@1.9.0)(@types/node@24.0.13)(@vitest/ui@4.0.14)(jiti@2.6.1)(jsdom@26.0.0)(lightningcss@1.30.2)(terser@5.43.1)(tsx@4.19.2)(yaml@2.8.0)
 
   apps/web:
     dependencies: