Advance WBV2 through native engine module matrix

docs/tasks/WBV2-P10-000.md

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+# WBV2-P10-000: native engine parity continuation root
+
+- task: WBV2-P10-000
+- parent: WBV2-P9-004
+- status: done
+- gap: workflow:authorize_native_engine_parity_continuation
+- ownerFamily: PROGRAM
+- targetImplementationClass: LOCAL_BOUNDED
+
+## 目标
+
+Authorize the next parity epoch after P9 bounded Chromium receipts. The next work must bind evidence to the compiled Blender native binary and web_engine.wasm; it must not claim full historical reproduction.
+
+## 验收
+
+- `node tools/web/generate-wbv2-native-parity-root.mjs`
+- `node tools/web/check-execution-control-plane.mjs`
+- `node tools/web/check-v2-task-index.mjs`
+
+## 交付与回滚
+
+- Reports: `tests/golden/WBV2-P10-000/`
+- Manifest: `tests/golden/WBV2-P10-000/manifest.json`
+- Rollback: restore P9-004 as queue parent without rewriting P7/P8/P9 evidence.