chore(rvw): Migrate review_tasks table to rvw_schema

Database migration:
- Move review_tasks table from public to rvw_schema
- Update Prisma schema @@schema directive
- Regenerate Prisma Client

Verified:
- Table location: rvw_schema
- Prisma ORM queries: working
- Data integrity: 40 records preserved
- User relation: working

Documentation updated to reflect schema migration complete.

backend/prisma/schema.prisma

@@ -337,7 +337,7 @@ model ReviewTask {
   @@index([createdAt])
   @@index([isArchived])
   @@map("review_tasks")
-  @@schema("public")
+  @@schema("rvw_schema")
 }
 
 model AslScreeningProject {

docs/03-业务模块/RVW-稿件审查系统/00-模块当前状态与开发指南.md

@@ -315,7 +315,7 @@ Content-Type: multipart/form-data
 
 | 问题 | 当前 | 目标 | 优先级 |
 |------|------|------|--------|
-| Schema位置 | public | review_schema | P2 |
+| Schema位置 | ✅ rvw_schema | - | ✅ 已完成 |
 | 任务处理 | ✅ pg-boss | - | ✅ 已完成 |
 | 报告导出 | ✅ Word (.docx) | PDF优化 | P3 |