Kernova tooling 0.1.4-beta

Kernova tooling 0.1.4-beta

• Changed Modrinth version_type and CurseForge release_type config to auto.
• Added publisher logic that derives release, beta, or alpha from the pack pack_version suffix, falling back to release for unknown or unsuffixed versions.
• Covered automatic release-channel metadata for CurseForge and Modrinth upload paths with unit tests.

Validation:

• updater/.venv/bin/python -m unittest discover -s updater/tests
• updater/.venv/bin/kernova-update validate --artifacts
• Modpack upload dry-run skipped because no .mrpack or .zip artifacts exist in the working tree.

Modpack publishing was intentionally not performed. PackPing feed was not pushed.

Remaining manual work: none.