Save beatmap file to database if gotten from API

nise-backend/src/main/kotlin/com/nisemoe/nise/scheduler/ImportScores.kt

@@ -629,6 +629,11 @@ class ImportScores(
             if(beatmapFile == null) {
                 this.logger.error("Failed to fetch beatmap file for beatmap_id = $beatmapId from osu!api")
                 return
+            } else {
+                dslContext.update(BEATMAPS)
+                    .set(BEATMAPS.BEATMAP_FILE, beatmapFile)
+                    .where(BEATMAPS.BEATMAP_ID.eq(beatmapId))
+                    .execute()
             }
         }