big ole refactor

internal/handlers/team_shortnames_unique.go

@@ -15,7 +15,7 @@ import (
 // and also validates that they are different from each other
 func IsTeamShortNamesUnique(
 	s *hws.Server,
-	conn *bun.DB,
+	conn *db.DB,
 ) http.Handler {
 	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		getter, err := validation.ParseForm(r)
@@ -38,7 +38,7 @@ func IsTeamShortNamesUnique(
 		}
 
 		var isUnique bool
-		if ok := db.WithReadTx(s, w, r, conn, func(ctx context.Context, tx bun.Tx) (bool, error) {
+		if ok := conn.WithReadTx(s, w, r, func(ctx context.Context, tx bun.Tx) (bool, error) {
 			isUnique, err = db.TeamShortNamesUnique(ctx, tx, shortName, altShortName)
 			if err != nil {
 				return false, errors.Wrap(err, "db.TeamShortNamesUnique")