Update:

client/postgresql/postgres.go

@@ -1,23 +1,14 @@
 package postgresql
 
+// Jackc/pgx helper
+
 import (
-	"context"
 	"errors"
 
 	"github.com/jackc/pgx/v5"
 	"github.com/jackc/pgx/v5/pgconn"
-	"github.com/jackc/pgx/v5/pgxpool"
 )
 
-func Connect(connStr string) (*pgxpool.Pool, error) {
-	pool, err := pgxpool.New(context.Background(), connStr)
-	if err != nil {
-		return nil, err
-	}
-
-	return pool, nil
-}
-
 func IsDuplicatedRow(err error) error {
 	var pgErr *pgconn.PgError
 

client/rabbitmq/rabbitmq.go

@@ -1,5 +1,7 @@
 package rabbitmq
 
+// rabbitmq/amqp091-go helper
+
 import (
 	"bytes"
 	"encoding/json"