Issue observed in python with library libsql 0.1.11. Without the delete both rows are reliably returned by vector_top_k, it doesn't seem like an insert doing an overwrite, more like a too-broad delete ...

Using raw SQL in Rust is verbose, and Rust ORMs (Diesel, SeaORM) require schema definitions in Rust, don't compose well with TypeScript frontends, and add significant build complexity. For Tauri apps ...