重构并拆分项目

service/migrations/20260601000002_pending_approvals.sql

@@ -0,0 +1,17 @@
+-- 待审批的工具调用
+CREATE TABLE IF NOT EXISTS pending_approvals (
+    id UUID PRIMARY KEY,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    expires_at TIMESTAMPTZ NOT NULL,
+    user_id TEXT NOT NULL,
+    skill_name TEXT NOT NULL,
+    params JSONB NOT NULL,
+    code_hash TEXT NOT NULL,
+    attempts_left INTEGER NOT NULL DEFAULT 3,
+    status TEXT NOT NULL DEFAULT 'pending',
+    result JSONB,
+    consumed_at TIMESTAMPTZ
+);
+
+CREATE INDEX IF NOT EXISTS idx_pending_approvals_user_status
+    ON pending_approvals (user_id, status);