fix: accept diagnostic rectification gates

docs/BUG_HISTORY.md

@@ -1429,3 +1429,18 @@
 - 相关记录：BUG-018、BUG-073
 - 复发自：BUG-018
 - 修复版本：待提交（本地可测）
+
+## BUG-077 | Python 诊断门状态导致历史事件评分误报 503
+
+- 状态：resolved
+- 首次发现：2026-07-26
+- 最近更新：2026-07-26
+- 影响面：生时校正历史事件评分、Python 技术合同到 Web 候选结果的适配边界
+- 用户现象：用户提交第一条可评分历史事件后，请求返回 503，日志显示 `stage=score_events error=ZodError`，开放叙事无法继续收敛。
+- 触发条件：Python `technique_contract.gates` 返回诊断专用状态 `diagnostic_fail`。
+- 根因：Python 引擎合法使用 `diagnostic_fail` 表示诊断未通过但不构成技术异常；Web wire schema 只接受 `pass | fail | blocked | not_evaluated`，因此在业务判断前拒绝整份候选结果。
+- 修复：Web wire schema 接受 `diagnostic_fail`，并在共享适配边界将其规范化为内部既有的 `fail`；不扩大持久化合同，不修改 Python 引擎。
+- 验证：适配器回归覆盖含 `diagnostic_fail` 的技术合同并断言内部状态为 `fail`；聚焦测试、目标 ESLint 与 `git diff --check` 通过。
+- 防复发：跨语言 wire schema 必须覆盖 Python 真源可返回的枚举；诊断状态在适配边界归一化，内部领域模型继续保持最小稳定集合。
+- 相关记录：BUG-067、BUG-075
+- 修复版本：本次修复提交

frontend/src/lib/birth-time-journey-adapters.ts

@@ -141,7 +141,7 @@ const candidateResultApiSchema = z.object({
     confirmation_allowed: z.boolean().optional(),
     decision: z.enum(["continue_rectification", "confirm_minute"]).optional(),
     gates: z.record(z.string(), z.object({
-      status: z.enum(["pass", "fail", "blocked", "not_evaluated"]),
+      status: z.enum(["pass", "fail", "diagnostic_fail", "blocked", "not_evaluated"]),
       reason: z.string(),
     }).strict()).optional(),
   }).optional(),
@@ -299,7 +299,12 @@ function adaptCandidateResult(parsed: z.infer<typeof candidateResultApiSchema>):
       canonicalInputHash: parsed.technique_contract.canonical_input_hash,
       confirmationAllowed: parsed.technique_contract.confirmation_allowed,
       decision: parsed.technique_contract.decision,
-      gates: parsed.technique_contract.gates,
+      gates: parsed.technique_contract.gates
+        ? Object.fromEntries(Object.entries(parsed.technique_contract.gates).map(([name, gate]) => [
+            name,
+            { ...gate, status: gate.status === "diagnostic_fail" ? "fail" : gate.status },
+          ]))
+        : undefined,
     } } : {}),
   });
 }

frontend/tests/birth-time-journey-adapters.test.ts

@@ -249,12 +249,30 @@ test("rectification adapter normalizes an event-scored candidate result", () =>
       legacy_server_metadata: { source: "existing-engine" },
     }],
     algorithm_version: "birth-time-event-scoring-v1",
+    technique_contract: {
+      calculation_status: "evaluated",
+      used_divisional_charts: ["D10"],
+      used_arudha: [],
+      dasha_tracks: ["vimshottari"],
+      missing_layers: [],
+      auxiliary_layers: [],
+      hard_blockers: ["neighbor_stability"],
+      confirmation_allowed: false,
+      decision: "continue_rectification",
+      gates: {
+        neighbor_stability: {
+          status: "diagnostic_fail",
+          reason: "diagnostic_only_unique_lead_at_plus_minus_1_2_5_minutes",
+        },
+      },
+    },
   });
 
   assert.equal(result.resultId, "1d8ee348-61a3-433d-8907-ff6d281b9992");
   assert.equal(result.winningSegment?.representativeTime, "14:24");
   assert.equal(result.canApply, false, "an old or incomplete engine receipt cannot open minute confirmation");
   assert.deepEqual(result.evidence[0]?.ruleIds, ["vim_md_domain_house"]);
+  assert.equal(result.techniqueReceipt?.gates?.neighbor_stability?.status, "fail");
   assert.equal("legacy_server_metadata" in (result.evidence[0] ?? {}), false);
 });