Module pool 

r2d2 connection pool for the ToolHub SQLite DB.

The pool is wired so every connection it hands out has the sqlite-vec extension auto-loaded (via crate::ensure_vec_extension) and finds the schema already migrated. Open the pool once at startup and clone it into axum/tower handlers.

Functions

open_pool

Open and migrate the DB at path, returning a ready-to-use connection pool. Migrations run on a single bootstrap connection that is dropped before the pool is built, so pooled handles never see a half-applied DB.