fix: reduce supervisor stalls and preserve task delivery

Load Supervisor graphs only when opened, preserve source details on demand, reuse indexed story digests and window selection lists without losing keyboard or focus behavior. Route heavy UI reads through the existing worker, batch scoped queries and construct each publication snapshot once.

Keep remote cancellation responsive during model-route cleanup, remove late routes and retain reported usage after response-cap cancellation. Preserve Telegram pending replies through polling conflicts, show delivery errors and honor the final rate-limit cooldown.

Schema 62 adds lookup indexes without rewriting user content; older clients cannot open upgraded data. Large review publication still blocks Main and remains documented follow-up work. Record the future storage-service direction without performing the architecture migration.

Validation: exact staged code passed isolated full tests (6212 passed, 87 skipped), typecheck and lint. Three-round source performance comparisons, SQLite migration equivalence, native Electron interaction checks and current-source Linux x64 Host validation completed; eight external text-model requests.

Release note: Supervisor opens reviews without loading the entire graph, keeps long selection lists responsive and preserves details and keyboard navigation. Remote cancellation and Telegram reply recovery are more reliable; remote fixes require an Agent build containing this change.

docs/roadmap/product-performance-experience-improvement-plan.md

@@ -1019,6 +1019,10 @@ Renderer 主线程降速 4 倍（Main 不降速，每次 reload 后重新应用
 
 ### PERF-15 存储接口异步化
 
+2026-10-05 范围澄清：目标职责与迁移边界见[桌面存储方向](../architecture/desktop-storage-direction.md)。
+当前先实施[监督者及执行路径的 KISS 局部修复](../review/kiss-local-fixes-2026-10-05.md)，
+完成、验证并提交后再讨论全面迁移。局部 Worker 复用不等于 PERF-15/16 已完成。
+
 - **优先级 / 状态：** P1 / 进行中（热点读走 worker；高频写降为 NORMAL、checkpoint 移出 Main、启动恢复按索引，见 7.2.2；接口异步化未开始）
 - **范围：** 在原进程内把 `AssistantDatabase`、`KnowledgeDatabase` 等对外接口改为异步，
   调用方全部 `await`；会话列表只返回摘要，搜索下推到 SQL，活动记录改为增量追加。
@@ -1030,9 +1034,10 @@ Renderer 主线程降速 4 倍（Main 不降速，每次 reload 后重新应用
 
 - **优先级 / 状态：** P1 / 待开始
 - **实施条件：** `PERF-15` 完成，调用方已全部异步。
-- **范围：** 新增独占 SQLite 的 `utilityProcess`，承接会话、知识库、向量检索、Story Graph
-  （含 Agent 主动调用的检索）、远程 Runtime 事件持久化、活动记录及文档解析；Main 只转发；
-  保证同一时刻只有一个写入方。吸收 `PERF-06` 的范围。
+- **范围：** 目标为统一管理业务 SQLite 的 `utilityProcess`，承接会话、知识库、Story Graph、
+  远程 Runtime 事件持久化和活动记录的业务事务；Main 只做校验与转发。重查询由受管只读 Worker
+  分担，解析、OCR 与 Runtime 执行保持独立，每个数据库明确一个写入所有者；不合并现有数据库。
+  职责、生命周期及 VS Code 对照以[桌面存储方向](../architecture/desktop-storage-direction.md)为准。
 - **验收：** 大知识库检索、会话列表和文档导入期间 Main event-loop 延迟达到批次目标；取消、
   崩溃恢复和迁移语义不回退。