clean up and improve perf

src-tauri/migrations/20230921085234_add_metadata_table.sql

@@ -1,9 +0,0 @@
--- Add migration script here
-CREATE TABLE
-  metadata (
-    id TEXT NOT NULL PRIMARY KEY,
-    event TEXT NOT NULL,
-    author TEXT NOT NULL,
-    kind NUMBER NOT NULL DEFAULt 0,
-    created_at INTEGER NOT NULL
-  );