Fix default workflow candidates

Default audit candidates from node definition

feat(workflow): mywkinstances 支持 keyword 查询业务号与流程名称

GET /hxworkflow/workflow/mywkinstances 增加 keyword 参数；仓储层对 Reference 与 WkDefinition.Title 做 Contains 模糊匹配；GetMyInstancesCount 与版本接口同步；修正 WithVersion 路径下 reference 仅精确匹配的偏差。

Made-with: Cursor

fix(workflow): 统计逻辑修正与接口文档完善

- 概览统计改为单次 GroupBy，避免多次 COUNT 竞态
- 耗时统计在内存中统一计算中位数，修复分组下中位数恒为 0
- 错误统计时间口径改为实例 CreateTime，与错误率分母一致
- 按模板统计增加 SuspendedCount，分项与总数可对齐
- 业务类型按月统计限定当年并避免跨年同月合并
- 趋势周粒度改为内存分组，修复 EF 无法翻译 StartOfWeek
- 统计相关 HTTP API 补充 XML 文档注释

Made-with: Cursor

feat(workflow): 实例通知删除接口、事件数据与控制器扩展

Made-with: Cursor

feat: modify bug

fix(workflow): restore engine registration for tenant definitions

Register persisted workflow definitions across tenants during startup and backfill missing engine registrations when a start request finds the engine state missing.

Made-with: Cursor

fix(workflow): restore engine registration for tenant definitions

Register persisted workflow definitions across tenants during startup and backfill missing engine registrations when a start request finds the engine state missing.

Made-with: Cursor

fix(workflow): sync persisted definitions to engine

Persist current definition versions through a single path that also refreshes workflow engine registration so draft-to-published node updates can be started immediately.

Made-with: Cursor

fix(workflow): persist nodes when initializing definition graph

Handle the first node update for definitions that do not yet have persisted nodes so newly submitted graph nodes are saved to the database instead of being skipped.

Made-with: Cursor