完善借款、编号、付款与预算并发及验收（09-06-release-gate-integrity）

汇总已落盘的借款本金与还款、兼容历史编号的周期化编号、付款责任与回单核验、报销进度和排序、PWA/采购事务、错误原因与日期校验及ERP退役。
统一共享预算池锁序和锁后判断，恢复差旅原预算选择，补原因码固定夹具及反向完整性检查。
纳入配套迁移、测试、受管QA、分层验收合同、规约及任务记录；原始证据留在ignored artifacts。

关联任务：09-17-company-loan-principal-repayment、09-17-erp-exclusive-retirement、09-18-reimbursement-periodic-numbering、09-08-reimbursement-payment-closeout、09-18-local-concurrency-product-fixes、09-19-budget-pool-concurrency、09-05-error-explainability-payment-readiness。
预算补审由Claude定向验证2文件928项通过，原4446/28及r6结果仍仅对应各自历史输入；本轮未重跑测试。
完整新候选门禁、R1真实入口接入与12项公网义务仍开放。生产编号未启用、差旅仍冻结；不推送、不部署，不宣称发布资格。

.trellis/tasks/09-19-budget-pool-concurrency/task.json

@@ -0,0 +1,80 @@
+{
+  "id": "budget-pool-concurrency",
+  "name": "budget-pool-concurrency",
+  "title": "预算池占用与释放并发一致性修复",
+  "description": "预算并发本地修复及独立审查完成；两项必修经Claude定向928项验证通过并关闭。发布完整门禁延期，任务保留in_progress，未提交部署。",
+  "status": "in_progress",
+  "dev_type": "backend",
+  "scope": "budget-control",
+  "package": null,
+  "priority": "P1",
+  "creator": "shunli",
+  "assignee": "shunli",
+  "createdAt": "2026-09-19",
+  "completedAt": null,
+  "branch": null,
+  "base_branch": "main",
+  "worktree_path": null,
+  "commit": null,
+  "pr_url": null,
+  "subtasks": [],
+  "children": [],
+  "parent": null,
+  "relatedFiles": [
+    "server/src/services/budgetPool.js",
+    "server/src/services/purchaseBudget.js",
+    "server/src/services/travelPayments.js",
+    "server/src/services/feeControl.js",
+    "server/src/routes/reimbursements.js",
+    "server/src/routes/purchaseRequests.js",
+    "server/src/routes/travelRequests.js",
+    "server/src/routes/travelTransactions.js",
+    "scripts/qa/test-budget-pool-db.cjs"
+  ],
+  "notes": "",
+  "meta": {
+    "planningSource": "user-provided independent review and request to address three related paths together",
+    "implementationApproval": "APPROVED_BY_USER_20260919",
+    "findingId": "BUDGET-LOST-UPDATE-01",
+    "discoveryStatus": "CONFIRMED_STATIC",
+    "discoverySeverity": "P1",
+    "discoveryCommit": "b1d25d3c9939c0020e7b4f75868cd97c35c16ba8",
+    "remediationStatus": "LOCAL_VERIFIED_INDEPENDENT_REVIEWED",
+    "deploymentStatus": "NOT_DEPLOYED",
+    "externalVerificationStatus": "NOT_TESTED",
+    "report": "artifacts/qa-governance/business-followup-claude-review-20260919T023537Z.txt",
+    "reportSha256": "b48e5f53340e139e5a97b5fdcb6d7003881a80a8a08d4004d01aaa6a759d2d0b",
+    "evidence": "artifacts/qa-governance/budget-pool-concurrency-20260919",
+    "coordinatorTask": ".trellis/tasks/09-06-release-gate-integrity",
+    "independentReview": "PASS_SCOPED_BUDGET_PATCH",
+    "deploymentAuthorized": false,
+    "travelReactivationAuthorized": false,
+    "targetedPostgresPassed": 28,
+    "targetedUnitPassed": 526,
+    "fullCandidate": "INTERRUPTED_NOT_PASS",
+    "deploymentEligible": false,
+    "backendFilesPassed": 225,
+    "backendTestsPassed": 4446,
+    "backendOriginalConditionalSkip": 1,
+    "browser": {
+      "passed": 29,
+      "interrupted": 4,
+      "notRun": 339,
+      "retriedCases": 0
+    },
+    "releaseFullGate": "DEFERRED_UNTIL_RELEASE_PREPARATION",
+    "reviewReport": "artifacts/qa-governance/budget-pool-claude-review-20260919T043257Z.txt",
+    "reviewFixEvidence": "artifacts/qa-governance/budget-pool-concurrency-20260919/review-fixes-20260919",
+    "reviewFixTests": "CLAUDE_PASSED_2_FILES_928_TESTS_NO_SKIPS",
+    "reviewFixFiles": [
+      "server/src/routes/travelRequests.js",
+      "server/tests/unit/routes/travel-request.errors.test.js",
+      "server/tests/unit/fixtures/error-reason-messages.json",
+      "server/tests/unit/scripts/error-reason-client.test.js"
+    ],
+    "findingResolution": "RESOLVED_LOCAL_NOT_DEPLOYED",
+    "reviewFixResult": "artifacts/qa-governance/budget-pool-concurrency-20260919/review-fixes-20260919/claude-result-20260919T044304Z.md",
+    "reviewFixResultSha256": "cb7996f6dcacc3ffd44a398b705ed840bf51ed6a0e312336933a25f93813a8f9",
+    "requiredReviewFindingsOpen": 0
+  }
+}