Add configuration fields for generic recursive archive extraction:
- MaxDepth: maximum nesting depth for archive extraction (default 0 = disabled)
- MaxExtractionSizeBytes: per-archive extraction size limit (default 500MB)
- MaxFileCount: per-archive file count limit (default 10,000)
- MaxTotalExtractionBytes: total extraction size limit (default 2GB)
- ExcludeExtensions: archive extensions to skip during extraction
These fields lay the groundwork for cross-cataloger recursive archive
cataloging, where archives discovered during scanning can be extracted
and their contents made visible to all catalogers.
Signed-off-by: Thomas Bechtold <thomasbechtold@jpberlin.de>
