feat(db): 0013 tasks tables and 0014 agent_run_event; tasks uses db migrations

tasks_run_meta/tasks_fact/tasks_op_ledger move into packages/db (if not exists, old
tasks_migration tables dropped); packages/tasks/migrations and migrateTasksTables
removed, tests migrate their schema with @umt/db. agent_run_event(run_id, seq, type,
at, payload) with (run_id, seq) primary key; types regenerated, db-sync covers it.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

packages/tasks/test/crash-recovery.test.ts

@@ -6,6 +6,7 @@ import {
   connectDb,
   createSideEffectTable,
   dropSchemas,
+  migrateBizSchema,
   pgAvailable,
   resetSchemas,
   setupEngine,
@@ -46,6 +47,7 @@ describe.skipIf(!hasPg)("崩溃恢复(worker 子进程 kill -9)", () => {
   beforeAll(async () => {
     await resetSchemas(schemas);
     db = connectDb(schemas.biz);
+    await migrateBizSchema(db, schemas.biz);
     await createSideEffectTable(db);
     engine = await setupEngine(db, schemas, createTestRegistry(db)); // 只做客户端,不起 worker
   }, 30_000);