v1.3.1

Fixed

• Test suite downloaded real ~6 GB gnomAD cache on every run, filling CI
  runner disk. All db update tests now use a 792-byte mock fixture via
  file:// URL — same pattern as ClinVar, PharmGKB, and GWAS. No
  production code changes.

Changed

• CI: job timeout (20 min), pytest step timeout (15 min),
  workflow_dispatch trigger, verbose output (pytest -v --tb=short)
• Ship tooling: scripts/tag-release.sh derives tag from pyproject.toml
  (single source of truth)
• Git hooks: raw .githooks/pre-push replaces pre-commit framework shim,
  blocks tag pushes where version doesn't match
• CONTRIBUTING.md: corrected slow-test documentation (CI skips them, not
  runs them), added "Run the full suite locally" section
• Documentation: fixed stale hook instructions, added missing changelog
  comparison links and ADR index entries
• Removed dead code: scripts/check_version_tag.sh
• Removed version-tag-match entry from .pre-commit-config.yaml