Add deduplicated WBV2 inventory coverage workflow

docs/tasks/WBV2-P14-003.md

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+# WBV2-P14-003: close_inventory_coverage_gate
+
+- task: WBV2-P14-003
+- parent: WBV2-P14-002
+- status: done
+- gap: workflow:close_inventory_coverage_gate
+- ownerFamily: RELEASE
+- targetImplementationClass: LOCAL_BOUNDED
+
+## 目标
+
+Close the coverage gate with a limited declaration and machine-checkable batching policy.
+
+## 输入与范围
+
+- Focused input: `tests/golden/WBV2-P14-002/capability-evidence-report.json`
+- Capability matrix (streamed by generator): `tests/golden/WBV2-P14-002/capability-evidence-matrix.json`
+- Parent evidence: `tests/golden/WBV2-P14-002/manifest.json`
+- Production entrypoint: `node tools/web/generate-wbv2-inventory-coverage-gate.mjs --write`
+
+## 验收
+
+- all 6900 entries remain accounted for
+- hash-bound evidence is reused before any new execution
+- malformed, hash-drift, unsupported, or false-completion input keeps in_progress
+- `node tools/web/generate-wbv2-inventory-coverage-gate.mjs --write`
+- `node tools/web/check-task-context.mjs --task WBV2-P14-003 --write`
+
+## 交付与回滚
+
+- Reports: `tests/golden/WBV2-P14-003/`
+- Status: `docs/status/WBV2-P14-003.md`
+- Manifest: `tests/golden/WBV2-P14-003/manifest.json`
+- Rollback: restore WBV2-P14-002 as queue parent.