fix: align DeepSeek canary tool rounds with gate

scenarios/production-regressions/agent-run/PRC-REL-002.json

@@ -0,0 +1,16 @@
+{
+  "id": "PRC-REL-002",
+  "scenario_ids": ["REL-06", "REL-09", "REL-11"],
+  "failure_signature": "gate-production-drift-deepseek-thinking-tool-round-reasoning-content-replay-rejected",
+  "synthetic_intent": "验证工具调用后的合成 DeepSeek 会话经过生产候选兼容链路，禁用思考模式，并在兼容依赖失效时让灰度流量回落稳定版本。",
+  "source_batch_id": "incident-20260726-deepseek-tool-round",
+  "evidence_digest": "97171fe1d94e0297cb0b932cf1ff18e8d1760519300f7308b9f8cc4e9517e022",
+  "contains_personal_data": false,
+  "privacy_review": {
+    "reviewed_by": "release-gate-maintainers",
+    "reviewed_at": "2026-07-26T23:55:00+08:00"
+  },
+  "automation": {
+    "command": ["node", "--test", "release-gate/deepseek-production-parity.test.mjs"]
+  }
+}

scenarios/production-regressions/manifests/active.json

@@ -1,6 +1,6 @@
 {
-  "fixture_ids": ["PRC-REL-001"],
+  "fixture_ids": ["PRC-REL-001", "PRC-REL-002"],
   "reviewed_by": "release-gate-maintainers",
   "reviewed_at": "2026-07-26T12:00:00+08:00",
-  "notes": "仅收录已脱敏的 runtime 启动回归签名；不包含聊天原文、用户身份或生产地址。"
+  "notes": "仅收录已脱敏的 runtime 启动和生产配置同构回归签名；不包含聊天原文、用户身份或生产地址。"
 }