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>

web/playwright.release.config.ts

@@ -14,7 +14,7 @@ const testOrigin = `http://127.0.0.1:${testPort}`;
 
 export default defineConfig({
   testDir: "tests/e2e",
-  testMatch: "cross-browser.spec.ts",
+  testMatch: ["cross-browser.spec.ts", "upstream-blendfile-versioning.spec.ts"],
   timeout: 45_000,
   expect: { timeout: 15_000 },
   fullyParallel: false,
@@ -29,7 +29,7 @@ export default defineConfig({
     trace: "retain-on-failure",
   },
   webServer: {
-    command: `npm run dev -- --host 127.0.0.1 --port ${testPort} --strictPort`,
+    command: `BLENDER_WEB_HTTP_PORT=${testPort} node ../tools/web/deployment-http-server.mjs "${process.env.WBV2_CASE_APP ?? 'dist'}"`,
     url: testOrigin,
     reuseExistingServer: false,
     timeout: 30_000,