Retention Editor added in UI

Time set in Schedular added

backend/.env.example

@@ -3,5 +3,8 @@ AWS_SECRET_ACCESS_KEY="your_s3_secret"
 RESTIC_REPOSITORY="s3:https://s3.eu-central-1.amazonaws.com/bucket-name"
 RESTIC_PASSWORD="restic_encryption_password"
 ZFS_POOL_NAME="incus-pool"
+RESTIC_KEEP_DAILY=7
+RESTIC_KEEP_WEEKLY=0
+RESTIC_KEEP_MONTHLY=0
 PORT=3000
 API_TOKEN=""