a8aef7b9b2
Adds a 'Reissue claims (SP24)' section under the Manual SFTP mode
heading, pointing the operator at the new CLI subcommand with a
worked example against the dzinesco July-8 billing layout.
Covers:
- the canonical command (full flag set, full output path)
- the 5-step workflow (parse / validate / serialize / write / zip)
- the exit-code contract (0/1/2)
- the IG-correctness guard's purpose + the regression story
- the 'no SFTP' boundary so the operator doesn't expect this
to push files to Gainwell (use submit-batch for that)