M5(2/3): process 用例与流转 —— 流程引擎的确定性调度

- routing domain:选边(XOR 恰取一条 + 默认分支兜底;AND 全走)、边映射装配(四类来源 +
  S-FEEL 转换)、AND 汇合回齐(容忍分支不阻汇合)、审批点驳回走向声明式
- process-service:起单 → 调度节点 → 负责人四策略解析(结果与依据留痕)→
  活动起单 / 审批点卡工位 / 终点收束按来源回执;任务终态到达继续流转或走失败走向四选一;
  审批驳回按声明回指定节点重开新实例;状态每次变动后重算聚合投影
- adapter:流程包(id × version)、工作流实例、节点实例三表持久 —— 崩溃后可续跑

ADR 待补项登记为 debt M5-1:§6.1 的 Mastra workflow 编译器作为可替换 adapter 后补,
当前由自持确定性状态机承担,语义等价、usecase 不动

325 个测试通过,门禁五道全绿

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01KeDBx2PHLavbURXB8LJJ7m

apps/api/src/modules/process/index.ts

@@ -3,6 +3,7 @@
  */
 export type {
   ActivityContractFace,
+  AssembleScope,
   Candidate,
   ClosureInput,
   ClosureReport,
@@ -10,12 +11,40 @@ export type {
   NodeInstance,
   OwnerSpec,
   ProcessPackage,
+  ProcessService,
   ResolveContext,
   Resolution,
+  StartWorkflowInput,
+  WorkflowRecord,
   WorkflowState,
 } from './contract.ts';
 export { NotPublishableError, PositionVacantError } from './contract.ts';
 
+export type {
+  ActivityDirectory,
+  ApprovalGateway,
+  Clock,
+  FlowEventPublisher,
+  IdGenerator,
+  OrgDirectory,
+  ProcessStore,
+  ReceiptNotifier,
+  Sfeel,
+  TaskGateway,
+} from './port.ts';
+
+export type { ProcessServiceDeps } from './internal/usecase/process-service.ts';
+export { createProcessService } from './internal/usecase/process-service.ts';
+
+export {
+  assemble,
+  dispatchOf,
+  joinReady,
+  rejectRouteOf,
+  selectEdges,
+  startNodeOf,
+} from './internal/domain/routing.ts';
+
 export { checkClosure, publishable } from './internal/domain/closure.ts';
 export {
   aggregateWorkflowState,
@@ -24,3 +53,6 @@ export {
   nextInstanceNumber,
   resolveOwner,
 } from './internal/domain/owner-resolution.ts';
+
+export { createProcessStore } from './internal/adapter/process-store.ts';
+export { nodeInstanceTable, processPackageTable, workflowTable } from './internal/adapter/process-schema.ts';