[BigDataDZ]

本PR的原始功能修复已进入最新main87c2966：原始修复提交已通过git merge-base --is-ancestor验证，相关核心文件及回归测试已核对。后续MCP运行时调整保留了配置缓存及Origin校验。当前PR头多出的上游同步/基线冲突处理不构成尚未合入的独立功能，因此关闭，避免重复审阅；分支与提交保留。

---

原始说明：
MCP configuration used one module-global cache for every database instance. Reading or saving one instance could therefore expose its enabled/mode/tenant policy through a different instance. An async read started before an administrator save could also complete later and replace that saved policy with an old database snapshot. Key the five-second cache by database identity with a WeakMap. Before publishing an async read, verify its entry is still current; a completed save or reset invalidates the old entry. Preserve successful-write caching, failure propagation, TTL/reset behavior and existing defaults/coercion. Move the unchanged values/coercion into configValues.js while retaining public exports; the facade shrinks from 90 to 57 lines, below its 73-line baseline. Three regression cases failed before the fix. New tests use real SQLite persistence with synchronous and async-only interfaces, deterministic read/save interleaving, TTL/reset and failed-save preservation. Focused 19/19; full suite 732 passed, 14 skipped, 0 failed; eval fixtures 14/14 (two judge results pending). Independent review approved. Architecture errors reduced 36 to 35 with no upward baselines. Includes validated prerequisites through #60. Native MySQL persistence acceptance, PostgreSQL/browser acceptance and both Docker configurations passed in CI. The online unit step passed; the job remains red at the existing architecture guard, so online eval is skipped. 本次邮件/审阅反馈核查后的更新：已合入当前main e19d784，解决上游合并#49–#54后产生的config/size-baseline.json冲突。冲突处理逐项取较低值，未提高任何已有基线；业务代码由Git自动合入。 当前head：de2e126c798fc8bead8d1c5d5631a719385974c4。本地定向验证：ℹ tests 38; ℹ pass 37; ℹ fail 0; ℹ skipped 1。跳过项未计为通过。远端CI已重新触发，结果以最新Checks为准，规模门禁尚未宣称全绿。 已再次对齐新发布的main5385ed3（V1.2.0/#76）。逐项保留较低基线，并修复上游基线JSON漏逗号（独立修复#77）；未提高已有数值。当前head：f7dcc97addc93403ead962022a6a192eb3d7046b。本地定向验证：ℹ tests 21; ℹ pass 21; ℹ fail 0; ℹ skipped 0。跳过项未计为通过。 新主分支全量诊断本身有5个失败；此前零失败结果不再代表当前上游。完整CI以最新Checks为准，未宣称全绿。