Extend `inno audit` with compliance mode — `--compliance` scans for data residue across directory

[ringo380]

Summary

Add --compliance mode to inno audit that runs data residue scanning across all tablespaces in a directory.

CLI Design

inno audit -d <datadir> --compliance --pattern "john@example\.com"
inno audit -d <datadir> --compliance --pattern "SSN:\d{3}-\d{2}-\d{4}" --json

Scope

• New mode for existing audit subcommand
• Uses compliance residue scanner (Data residue scanner — detect if specific column values persist anywhere in tablespace pages #175) across all .ibd files
• Reports per-file residue match counts
• JSON output includes file paths and match locations
• Parallel scanning with rayon

Depends on

#175 (data residue scanner)

Standalone

Not part of any epic.