init push

backend/store/pg/migration/000034_create_node_stats.up.sql

@@ -0,0 +1,7 @@
+CREATE TABLE IF NOT EXISTS node_stats (
+    id BIGSERIAL PRIMARY KEY,
+    node_id TEXT NOT NULL UNIQUE,
+    pv BIGINT NOT NULL DEFAULT 0,
+    created_at timestamptz NOT NULL DEFAULT NOW()
+);
+