feat(workflow): AI 行动闭环 BPMN 流程定义 — 随访/预约/预警三条审批流程

- ai_followup_workflow: 随访建议风险分级 + 医生审批
- ai_appointment_workflow: 预约建议风险分级 + 医生确认
- ai_alert_workflow: 预警确认风险分级 + 医生确认
- 启动时自动 seed 三条 published 状态的流程定义

crates/erp-server/src/main.rs

@@ -289,6 +289,12 @@ async fn main() -> anyhow::Result<()> {
                 .map_err(|e| anyhow::anyhow!("Failed to seed auth data: {}", e))?;
 
                 tracing::info!(tenant_id = %new_tenant_id, "Default tenant ready with auth seed data");
+
+                // Seed AI workflow definitions
+                if let Err(e) = erp_workflow::service::ai_workflow_seed::ensure_ai_workflows(&db, new_tenant_id).await {
+                    tracing::warn!(error = %e, "Failed to seed AI workflow definitions");
+                }
+
                 new_tenant_id
             }
         }