refactor: update sevenzip import to use vendored package

Updated import path from github.com/bodgit/sevenzip to
bookhoard/internal/sevenzip to use the vendored package.

internal/services/media_scanner.go

@@ -25,8 +25,8 @@ import (
 	"strings"
 	"time"
 
+	"bookhoard/internal/sevenzip"
 	epub "github.com/ArcadiaLin/go-epub"
-	"github.com/bodgit/sevenzip"
 	"github.com/fsnotify/fsnotify"
 	"github.com/jackc/pgx/v5"
 	"github.com/jackc/pgx/v5/pgtype"