SCRUM-5829 make MNV variants and all other allelic variants show up i…

[cmpich]

…n allele search result

[claude]

Code Review

Changes: Adds species abbreviation to gene symbols in allele search results, populates a new variantType field from variant data, and bumps curation.version from v0.47.2 to v0.47.4.

Verdict: Changes look correct. No bugs, performance issues, or security concerns.

• Null checks are properly handled throughout — allele.getTaxon(), SpeciesType.getTypeByNameField() result, variant type and name are all guarded before use.
• The variant type stream pipeline correctly filters, deduplicates with distinct(), and avoids setting an empty list.
• The allele null check at line 22 ensures the taxon access at line 61 is safe.
• New variantType field on AlleleSearchResultDocument is additive and non-breaking.

LGTM.