Fix artist page numbering for Yandex API

Start page numbering at 1 instead of 0 in checkArtistTracks and
checkArtistAlbums. Yandex Music API rejects page=0 with
400 'Parameters requirements are not met'.

GetArtistInfo works because it doesn't use pagination.

internal/monitor/monitor.go

@@ -136,7 +136,7 @@ func (m *Monitor) checkArtist(ctx context.Context, artistID int) {
 
 // checkArtistTracks checks for new tracks from an artist
 func (m *Monitor) checkArtistTracks(ctx context.Context, artistID int, artistName string) {
-	page := 0
+	page := 1
 	pageSize := 50
 
 	for {
@@ -174,7 +174,7 @@ func (m *Monitor) checkArtistTracks(ctx context.Context, artistID int, artistNam
 
 // checkArtistAlbums checks for new albums from an artist
 func (m *Monitor) checkArtistAlbums(ctx context.Context, artistID int, artistName string) {
-	page := 0
+	page := 1
 	pageSize := 50
 
 	for {