Release v0.4.13

- App::sharedStatics() — worker-global statics opt-out for coroutine-legacy
  throughput; every other legacy semantic stays per-request (#483)
- fix(#485): file-based api/ endpoints reachable at ANY nesting depth —
  processApi() folds deep tail dirs into $module; adversarially test-pinned
- ext-zealphp pin v0.3.59 -> v0.3.60: ext#59 per-coroutine constant lanes
  (cross-coroutine define() leak 97%->0, corrupted-zval OOM eliminated) +
  coroutine-legacy request-begin statics perf fix (/ping 3,678 -> 15,657 rps,
  within 0-20% of plain coroutine)
- bug wave #467/#471/#474 + #478 urlencoded-POST raw-body fallback
- release-audit test-gap fill: PoolWorkerVarIsolationTest (#467), ext phpt 072
  (begin-exemption)