重构并拆分项目

service/migrations/20260601000003_scheduled_tasks.sql

@@ -0,0 +1,20 @@
+-- 定时任务表（Phase 6）
+CREATE TABLE IF NOT EXISTS scheduled_tasks (
+    id UUID PRIMARY KEY,
+    name TEXT NOT NULL UNIQUE,
+    description TEXT NOT NULL DEFAULT '',
+    user_id TEXT NOT NULL,
+    command TEXT NOT NULL,
+    shell TEXT NOT NULL DEFAULT '/bin/bash',
+    cwd TEXT NOT NULL DEFAULT '',
+    interval_seconds INTEGER NOT NULL,
+    enabled BOOLEAN NOT NULL DEFAULT true,
+    next_run_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    last_run_at TIMESTAMPTZ,
+    last_status TEXT,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE INDEX IF NOT EXISTS idx_scheduled_tasks_due
+    ON scheduled_tasks (enabled, next_run_at);