feat: enable worker process

internal/worker/queries.sql

@@ -0,0 +1,15 @@
+-- name: Ping :one
+SELECT 1;
+
+-- name: RegisterWorker :exec
+INSERT INTO worker_register (worker_id)
+VALUES (
+    $1
+);
+
+-- name: UpdateWorkerHeartbeat :exec
+UPDATE worker_register
+SET
+    heart_beat = now()
+WHERE
+    worker_id = $1;