Support InstaNovo schemas through v1.2.2

[BioGeek]

This PR updates mzident InstaNovo import support from the existing v1.1.4 coverage through InstaNovo v1.2.2.

Changes:

• Adds explicit InstaNovo version handling for v1.1.0, v1.1.4, and v1.2.2.
• Adds support for InstaNovo+ v1.2.2 and combined v1.2.2 prediction outputs.
• Tightens schema detection so transformer, diffusion, and combined outputs are disambiguated correctly.
• Handles empty token log probability columns where valid for InstaNovo+ outputs.
• Updates CV term/file-format mapping for the new supported versions.
• Adds focused prediction fixtures derived from sample prediction files

Tested with:

cargo test -p mzident instanovo --no-fail-fast

Result: 7 passed; 0 failed

Existing workspace warnings are unchanged and unrelated to this PR.

Note: the CI fails but that is due to an unrelated error. See #98 for a fix.

[douweschulte]

Thanks a lot for the additions! It is very nice to get some insight from the authors for parsing these files. Also thanks a lot for the included example files with the source given. I will add some very small touch ups directly after merging, on the column detection and version detection, but otherwise it looks perfect.