Root cause: tinypool worker teardown calls kill() which returns EPERM
in the act_runner host environment on Node.js v25.2.1. Tests pass but
the vitest process crashes during cleanup, causing CI failure.
Fix: --pool forks CLI flag on every package/service test script, plus
pool: 'forks' in all vitest.config.ts files. This uses child_process.fork()
worker management which handles termination cleanly.
60 package.json files updated, 10 vitest.config.ts files updated.
Aligns service-local vitest.config.ts with root config so tests pass
both via 'pnpm test' (uses service config) and 'npx vitest run' (uses root).
Fixes telemetry.test.ts which fails because its import chain eagerly
loads config.ts → envSchema.parse() requiring COSMOS_ENDPOINT/KEY/JWT_SECRET.
Added: RATE_LIMIT_STORE_MODE=memory, COSMOS_ENDPOINT, COSMOS_KEY, JWT_SECRET
(all test-safe placeholders, never used at runtime with DB_PROVIDER=memory)
- Add DB_PROVIDER=memory to vitest config for diagnostics tests
- Fix flaky timestamp comparison in 'should update a session' test
- Add 10ms delay between create and update
- Use toBeGreaterThanOrEqual instead of strict inequality
- All 17 diagnostics tests now pass
