refactor(data): 收口关系表运行时数据源

- 移除已迁移业务 AppData 运行时 fallback，改走领域 API 和关系表快读
- 补齐需求产品负责人、版本计划任务 JSON 和成员 username 回填迁移
- 统一治理字典入口，并补充 AI provider、数据源契约和领域服务测试

Co-Authored-By: Codex GPT-5 <codex@openai.com>

apps/server/prisma/schema.prisma

@@ -24,7 +24,8 @@ model User {
   createdTasks   Task[]          @relation("TaskCreator")
   assignedTasks  Task[]          @relation("TaskAssignee")
   projectMembers ProjectMember[]
-  requirements   Requirement[]
+  requirements   Requirement[] @relation("RequirementCreator")
+  productOwnedRequirements Requirement[] @relation("RequirementProductOwner")
   watchedTasks   TaskWatcher[]
 
   @@map("users")
@@ -116,11 +117,13 @@ model Requirement {
   sourceTarget String? @map("source_target")
   platform    String?
   creatorId   String?  @map("creator_id")
+  productOwnerId String? @map("product_owner_id")
   createdAt   DateTime @default(now()) @map("created_at")
   updatedAt   DateTime @updatedAt @map("updated_at")
 
   product Product @relation(fields: [productId], references: [id])
-  creator User?   @relation(fields: [creatorId], references: [id])
+  creator User?   @relation("RequirementCreator", fields: [creatorId], references: [id])
+  productOwner User? @relation("RequirementProductOwner", fields: [productOwnerId], references: [id])
 
   @@id([id, productId])
   @@unique([productId, code])
@@ -290,6 +293,7 @@ model VersionPlan {
   actualStartAt       DateTime? @map("actual_start_at")
   completedAt         DateTime? @map("completed_at")
   resultUrl           String?  @map("result_url")
+  tasks               Json     @default("[]")
   requirementCoverage Json     @default("[]") @map("requirement_coverage")
   logs                Json     @default("[]")
   createdAt           DateTime @default(now()) @map("created_at")