Add core database support and enhance documentation

- Introduced `MYSQL_CORE_DATABASE` in `.env.example` and `settings.py` for core database configuration.
- Added `CoreReadOnlyRepository` for read-only access to the `jinrong_core` database.
- Updated `AGENTS.md`, `README.md`, and various documentation files to reflect new agent onboarding processes and project structure.
- Revised requirements in `requirements.txt` to include `langgraph` and `langchain-core`.
- Enhanced `FLOW.md` with local bootstrap instructions for setting up the core simulation environment.
- Added new scripts for database creation and seeding for the core simulation library.
- Improved overall documentation for clarity on project architecture and memory management.
- Updated `TODO.md` to reflect current development priorities and tasks.

docs/memory/REQUIREMENTS.md

@@ -20,8 +20,11 @@
 | F-01 | JWT + RBAC + 数据归属 | 越权 403 + audit；JWT 手册 §13 | 未做 | T-01 |
 | F-02 | 全量审计留痕 | trace_id 可还原 | 未做 | T-02 |
 | F-03 | 输入防护 | input_guard_log | 未做 | T-03 |
-| F-04 | Core 只读层 | 不改 Core 账 | 未做 | T-04 |
-| R0-DB | MySQL 共用 11 表 + Redis | 01-mysql-共用底座.sql | 未做 | T-05 |
+| F-04 | Core 只读层 | 不改 Core 账；Repository 只 SELECT | **部分** | T-04 |
+| R0-DB | MySQL 共用 11 表 + Redis | 01-mysql-共用底座.sql | SQL 已定；灌库待验 | T-05 |
+| R0-CORE | Core 模拟 + 同步 | reset.ps1 + sync 脚本 | **脚本已落地** | T-05 |
+
+**F-04 部分完成说明：** `app/repository/core_ro.py` + `scripts/core/*` + `settings.mysql_core_database` 已有；尚未接入 api/service Tool 与归属校验。
 
 ## Wave 1 · 内部 Agent P0