Enhance suitability assessment and documentation

- Implemented `check_suitability` method in `CoreReadOnlyRepository` for suitability determination based on customer and product risk levels.
- Added `build_suitability_log_row` function in `suitability.py` for mapping suitability check results to `risk_suitability_log`.
- Updated `AGENTS.md`, `ENVIRONMENT.md`, and `FLOW.md` to reflect changes in suitability assessment processes and documentation.
- Revised `FRAMEWORK.md` and `MEMORY.md` to clarify project structure and data flow related to suitability checks.
- Expanded `TODO.md` with tasks related to logging and auditing suitability assessments.

scripts/core/06-seed-nav.sql

@@ -13,4 +13,6 @@ INSERT INTO core_product_nav (product_id, nav, daily_chg_pct, nav_date) VALUES
 ('PROD-510500', 0.9800, -0.5000, '2026-09-04'),
 ('PROD-XYZ999', 0.9000, -2.0000, '2026-09-04'),
 ('PROD-000001', 1.0020,  0.0100, '2026-09-04'),
-('PROD-000002', 1.0050,  0.0200, '2026-09-04');
+('PROD-000002', 1.0050,  0.0200, '2026-09-04'),
+('PROD-WMG001', 1.0150,  0.0500, '2026-09-04'),
+('PROD-PRIV01', 1.0800,  0.3000, '2026-09-04');