handoff: VSync/event-wedge fixes + iterate 2.A–2.BC research notes

Source changes (dormant parity infra, retained from iterate 2.AI/2.AO):
- xenia-kernel/exports.rs: nt_create_event manual_reset polarity +
  related event wiring
- xenia-gpu/mmio_region.rs: D1MODE_VBLANK_VLINE_STATUS hardcode parity

Also lands the audit-runs/ analysis notes (.md/.txt/.json digests) for the
iterate 2.x VSync/0x10e8/0x1004 wedge investigation. Raw trace dumps
(.jsonl/.gz/.csv/.stdout) and agent worktrees (.claude/) are gitignored as
regenerable local artifacts — see memory + HANDOFF for the running findings.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

audit-runs/phase-b-state-equivalence/snap-001/canary/vfs.json

@@ -0,0 +1,71 @@
+{
+  "schema_version": 1,
+  "engine": "canary",
+  "resolve_path_probes": [
+    {
+      "is_directory": true,
+      "path": "\\Device\\Cdrom0",
+      "resolved": true,
+      "size": 0
+    },
+    {
+      "is_directory": true,
+      "path": "\\Device\\Cdrom0\\dat",
+      "resolved": true,
+      "size": 4096
+    },
+    {
+      "is_directory": true,
+      "path": "\\Device\\Cdrom0\\dat\\movie",
+      "resolved": true,
+      "size": 4096
+    },
+    {
+      "is_directory": null,
+      "path": "\\Device\\Cdrom0\\dat\\movie\\opening.bik",
+      "resolved": false,
+      "size": null
+    },
+    {
+      "is_directory": false,
+      "path": "\\Device\\Cdrom0\\default.xex",
+      "resolved": true,
+      "size": 3497984
+    },
+    {
+      "is_directory": null,
+      "path": "\\Device\\HardDisk0\\Partition1",
+      "resolved": false,
+      "size": null
+    },
+    {
+      "is_directory": true,
+      "path": "cache:\\",
+      "resolved": true,
+      "size": 0
+    },
+    {
+      "is_directory": null,
+      "path": "cache:\\nonexistent_probe",
+      "resolved": false,
+      "size": null
+    },
+    {
+      "is_directory": true,
+      "path": "game:\\dat",
+      "resolved": true,
+      "size": 4096
+    },
+    {
+      "is_directory": false,
+      "path": "game:\\default.xex",
+      "resolved": true,
+      "size": 3497984
+    }
+  ],
+  "mounted_devices_observed_count": 1,
+  "cache_root_listing": [],
+  "deterministic_skip": [
+    "host_path_realpath"
+  ]
+}