v0.4.0: rsID variant input, exon parent context, and workflow docs

rsID variant input, exon parent context, and workflow docs

Adds dbSNP rsID input to variant prediction and parent-transcript context to exon queries; corrects chromosome-name and gene-dossier prompt documentation.

Added

• ensembl_predict_variant accepts dbSNP rsIDs (e.g. rs334), routed to a new VEP GET /vep/{species}/id/{id} endpoint. (#11)
• ensembl_query_region exon features carry parentId and rank, explaining why the same exon ID can appear on multiple rows — once per parent transcript. (#9)

Changed

• Chromosome-name guidance in ensembl_query_region and ensembl_predict_variant no longer claims chr-prefixed names are unsupported; Ensembl normalizes them and accepts either form. (#10)

Fixed

• ensembl_gene_dossier prompt's variant workflow now attributes functional impact to VEP, not ensembl_query_region. (#7)

108 tests pass; bun run devcheck clean.