feat(health): Track 3 医疗阈值 — warning 种子 + 患者端只读 API

- 新增 6 条 warning 级别阈值种子数据（血压/心率/血糖参考范围）
- 新增 GET /health/critical-value-thresholds/public 患者端只读接口
- 扩展 indicator 验证支持 blood_sugar_fasting/postprandial 等新指标

crates/erp-server/migration/src/lib.rs

@@ -101,6 +101,7 @@ mod m20260501_000098_create_ai_suggestion;
 mod m20260501_000099_create_ai_risk_threshold;
 mod m20260501_000100_seed_action_inbox_menu;
 mod m20260502_000101_seed_health_dictionaries;
+mod m20260502_000102_seed_warning_thresholds;
 
 pub struct Migrator;
 
@@ -209,6 +210,7 @@ impl MigratorTrait for Migrator {
             Box::new(m20260501_000099_create_ai_risk_threshold::Migration),
             Box::new(m20260501_000100_seed_action_inbox_menu::Migration),
             Box::new(m20260502_000101_seed_health_dictionaries::Migration),
+            Box::new(m20260502_000102_seed_warning_thresholds::Migration),
         ]
     }
 }