v0.0.9 - Support for file format version 2

2025-06-29 0.0.9 release

• Added support for file format version 2 (v2)
  • Use -F 2 option to generate v2 files
  • Default remains v1 for compatibility
• v2 includes updated encryption scheme with stronger algorithms (see README for details)
• Decryption automatically detects format version
• Minimum required Go version updated from 1.23 to 1.24 (due to HKDF usage)

Note: In the upcoming 1.0.0 release, the default output format will switch to v2.
Please test v2 using the -F 2 option in this release.

See #34 for the overall migration plan.

[2025-07-16] Note: third-party-licenses.zip has been added to this release to address a previous omission.