Function execute 

pub fn execute(
    opts: &CorruptOptions,
    writer: &mut dyn Write,
) -> Result<(), IdbError>

Inject random bytes into an InnoDB tablespace file to simulate corruption.

Generates cryptographically random bytes and writes them into the file at a calculated or explicit offset. This is designed for testing checksum validation (inno checksum), InnoDB crash recovery, and backup-restore verification workflows.

Three targeting modes are available:

• Header mode (-k): Writes into the 38-byte FIL header area (bytes 0–37 of the page), which will corrupt page metadata like the checksum, page number, LSN, or space ID.
• Records mode (-r): Writes into the user data area (after the page header and before the FIL trailer), corrupting actual row or index data without necessarily invalidating the stored checksum.
• Offset mode (--offset): Writes at an absolute file byte position, bypassing page calculations entirely. Note that --verify is unavailable in this mode since there is no page context.

If no page number is specified, one is chosen at random. With --verify, the page’s checksum is validated before and after the write, showing a before/after comparison to confirm that corruption was successfully applied.