ci: run full suite + lint + typecheck; fix no-op load test

- CI previously ran 6 of 129 tests; now runs bun test (all 18 files),
  eslint --max-warnings=0, and tsc --noEmit, with a frozen-lockfile install.
- eslint flat config had a scoped (non-global) ignores key, so lint crawled
  the python venv, zombie frontend/ tree, and dist bundles (57k findings).
  Global ignores added; real source lints clean.
- load-test.ts passed while acquiring 0 of 1000 locks: its mock passed a
  truthy apiUrl ('url'), routing every op into the circuit breaker. Now runs
  local-only and asserts exactly one winning agent and no vanished ops.
- bun.lock resynced with package.json (hono 4.12.33).