chore: checkpoint web Blender migration source, tools and docs

Accumulated uncommitted work: GHOST Web backend, WebGL/GPU web layer,
web workflow engine and protocol, tooling, docs and task records.
Large generated evidence, user-testing archives, build snapshots and
imported test assets remain untracked.

Co-Authored-By: Claude Code <noreply@anthropic.com>

customdata

@@ -0,0 +1,20 @@
+{
+  "schemaVersion": 1,
+  "task": "WBV2-P1424-001",
+  "scope": "batch",
+  "pattern": "timer-",
+  "selectedUnits": [],
+  "sourcePathCount": 1,
+  "runtimePathCount": 0,
+  "hitCount": 7,
+  "truncated": false,
+  "hits": [
+    "2978:  if (timer->flags & WM_TIMER_TAGGED_FOR_REMOVAL) {",
+    "2981:  timer->sleep = do_sleep;",
+    "3043:  if (timer->customdata != nullptr && (timer->flags & WM_TIMER_NO_FREE_CUSTOM_DATA) == 0) {",
+    "3044:    MEM_delete_void(timer->customdata);",
+    "3045:    timer->customdata = nullptr;",
+    "3056:  timer->flags |= WM_TIMER_TAGGED_FOR_REMOVAL;",
+    "3079:  timer->customdata = nullptr;"
+  ]
+}