big ole refactor

internal/handlers/isunique.go

@@ -15,7 +15,7 @@ import (
 // Returns 200 OK if unique, 409 Conflict if not unique
 func IsUnique(
 	s *hws.Server,
-	conn *bun.DB,
+	conn *db.DB,
 	model any,
 	field string,
 ) http.Handler {
@@ -31,7 +31,7 @@ func IsUnique(
 			return
 		}
 		unique := false
-		if ok := db.WithNotifyTx(s, w, r, conn, func(ctx context.Context, tx bun.Tx) (bool, error) {
+		if ok := conn.WithNotifyTx(s, w, r, func(ctx context.Context, tx bun.Tx) (bool, error) {
 			unique, err = db.IsUnique(ctx, tx, model, field, value)
 			if err != nil {
 				return false, errors.Wrap(err, "db.IsUnique")