chore(points): 移除已废弃的 erp-points crate + 注释空桩和死常量

- 删除 erp-points/ 目录（全部 501 handler，功能由 erp-health 完整提供）
- 从 workspace Cargo.toml 和 erp-server 依赖中移除
- erp-dialysis event.rs: 说明事件由 erp-health 统一消费的设计意图
- erp-health event.rs: 标记 PATIENT_VERIFIED/PATIENT_DECEASED 为待实现

Cargo.toml

@@ -17,7 +17,6 @@ members = [
     "crates/erp-plugin-itops",
     "crates/erp-health",
     "crates/erp-ai",
-    "crates/erp-points",
     "crates/erp-plugin-assessment",
     "crates/erp-dialysis",
 ]
@@ -106,7 +105,6 @@ erp-config = { path = "crates/erp-config" }
 erp-plugin = { path = "crates/erp-plugin" }
 erp-health = { path = "crates/erp-health" }
 erp-ai = { path = "crates/erp-ai" }
-erp-points = { path = "crates/erp-points" }
 erp-dialysis = { path = "crates/erp-dialysis" }
 
 # Async streaming