Method abbreviate

src/sql-server-util/src/cdc.rs:573–583

Drops the `record_id` portion of the [`Lsn`] so we can fit an "abbreviation" of this [`Lsn`] into a [`u64`], without losing the total order.

(&self)

    /// Drops the `record_id` portion of the [`Lsn`] so we can fit an "abbreviation"
    /// of this [`Lsn`] into a [`u64`], without losing the total order.
    pub fn abbreviate(&self) -> u64 {
        let mut abbreviated: u64 = 0;

        #[allow(clippy::as_conversions)]
        {
            abbreviated += (self.vlf_id as u64) << 32;
            abbreviated += self.block_id as u64;
        }

        abbreviated
    }
}

impl fmt::Display for Lsn {