docs(platform): Add database documentation system and restructure deployment docs

Completed:
- Add 6 core database documents (docs/01-平台基础层/07-数据库/)
  Architecture overview, migration history, environment comparison,
  tech debt tracking, seed data management, PostgreSQL extensions
- Restructure deployment docs: archive 20 legacy files to _archive-2025/
- Create unified daily operations manual (01-日常更新操作手册.md)
- Add pending deployment change tracker (03-待部署变更清单.md)
- Update database development standard to v3.0 (three iron rules)
- Fix Prisma schema type drift: align @db.* annotations with actual DB
  IIT: UUID/Timestamptz(6), SSA: Timestamp(6)/VarChar(20/50/100)
- Add migration: 20260227_align_schema_with_db_types (idempotent ALTER)
- Add Cursor Rule for auto-reminding deployment change documentation
- Update system status guide v6.4 with deployment and DB doc references
- Add architecture consultation docs (Prisma guide, SAE deployment guide)

Technical details:
- Manual migration due to shadow DB limitation (TD-001 in tech debt)
- Deployment docs reduced from 20+ scattered files to 3 core documents
- Cursor Rule triggers on schema.prisma, package.json, Dockerfile changes

Made-with: Cursor

.cursor/rules/deployment-change-tracking.mdc

@@ -0,0 +1,34 @@
+---
+description: 当修改数据库Schema、依赖或配置时，提醒记录到待部署变更清单
+globs: backend/prisma/schema.prisma, backend/package.json, frontend-v2/package.json, extraction_service/requirements*.txt, r-statistics-service/**, backend/Dockerfile, frontend-v2/Dockerfile, extraction_service/Dockerfile, frontend-v2/nginx.conf, backend/.env.example
+alwaysApply: false
+---
+
+# 部署变更追踪提醒
+
+当你修改了以下文件，必须同步更新 `docs/05-部署文档/03-待部署变更清单.md`：
+
+## 触发条件 → 记录内容
+
+| 修改的文件 | 清单区域 | 记录什么 |
+|-----------|---------|---------|
+| `schema.prisma` | 数据库变更 | 迁移文件名 + 变更描述 |
+| `backend/package.json` (新依赖) | 后端变更 | 新增的 npm 包 |
+| `backend/Dockerfile` | 后端变更 | Dockerfile 变更原因 |
+| `frontend-v2/package.json` (新依赖) | 前端变更 | 新增的 npm 包 |
+| `frontend-v2/nginx.conf` | 前端变更 | Nginx 配置变更 |
+| `requirements*.txt` | Python 变更 | 新增/升级的 pip 包 |
+| `r-statistics-service/**` | R 引擎变更 | R 包或工具变更 |
+
+## 操作步骤
+
+1. 完成代码修改
+2. 打开 `docs/05-部署文档/03-待部署变更清单.md`
+3. 在对应区域追加一行记录
+4. 提交代码时包含清单更新
+
+## schema.prisma 额外规则
+
+- 修改 Schema 后必须运行 `npx prisma migrate dev --name xxx` 生成迁移
+- 禁止使用 `prisma db push`（除非原型探索，事后必须补迁移）
+- 迁移生成后同步更新 `docs/01-平台基础层/07-数据库/01-Prisma迁移历史与变更日志.md`