fix(kernel): KRNBUG-KE-001 — real KeResumeThread per canary mirror

Replace the no-op cookie-returner with a real impl per canary
xenia-canary/src/xenia/kernel/xboxkrnl/xboxkrnl_threading.cc:216-227
(XObject::GetNativeObject<XThread>()->Resume()). Mirrors
nt_resume_thread plumbing two functions below:
resolve_pseudo_handle -> scheduler.find_by_handle -> resume_ref.

Returns STATUS_SUCCESS if the KTHREAD-pointer-as-handle resolves,
STATUS_INVALID_HANDLE otherwise — matches canary's Resume()/!thread
return semantics.

Cascade-prediction scorecard (audit-018 -> post-fix):
- A PASS: tids 9 (entry=0x824D2878) and 10 (entry=0x824D2940)
  leave Suspended -> run prologue -> park on audio buffer-completion
  semaphores 0x828A3254 / 0x828A3230.
- B PARTIAL FAIL: NtSetEvent 667->3334; KeReleaseSemaphore=0;
  XAudioSubmitRenderDriverFrame=0.
- C FAIL (predicted 2->1, actual 2->2): both ExTerminateThread +
  KeReleaseSemaphore still canary-only.
- D FAIL: gamma-cluster blocker unchanged — pc-probe at
  0x82184318/0x82184374 no fires; dump-addr 0x828F4070 no DUMP;
  signal_attempts on 0x1004/0x100c/0x1020/0x15e4 still 0.

Necessary-but-not-sufficient: workers unsuspend but park on a
downstream gate that's part of the audit-009/-016/-017 gamma cluster.

Tests 600 -> 601 (+ke_resume_thread_unblocks_suspended_worker).
Lockstep instructions=100000003 imports=987516 deterministic x2.
Goldens re-baselined: sylpheed_n50m.json instructions
50000003->50000011, imports 407255->407247.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

crates/xenia-app/tests/golden/sylpheed_n50m.json

@@ -1,6 +1,6 @@
 {
-  "instructions": 50000003,
-  "imports": 407255,
+  "instructions": 50000011,
+  "imports": 407247,
   "unimpl": 0,
   "draws": 0,
   "swaps": 2,