v0.9.0

Summary

• Added the release-notes workflow needed for safer pre-releases, including checked-in curated notes, generated docs-site release pages, and validation that required release-note sections are present.
• Expanded source-of-truth readiness work with stronger schema verification, generated schema documentation, release dry-run checks, and an explicit integration coverage report.
• Continued the TypeScript migration by adding TypeScript checking infrastructure and converting the output generation path into typed modules.

Breaking Changes

None.

Data Changes

• No intentional generated season-table data change is included in this release.
• Added integration fixtures for 10 high-value seasons: 1921, 1923, 1930, 1951, 1991, 1994, 2004, 2019, 2021, and 2024.
• Expanded direct integration coverage to 43 of 138 season records, or 31.2% of the checked-in dataset.
• Added direct fixture coverage through tier7, including split Third Division seasons, failed re-election and demotion cases, folded-club rows, the EFL rebrand, COVID/points-per-game handling, tier 5, and modern National League North/South rows.

Bug Fixes

• Fixed release schema verification ordering so generated schemas can be checked reliably during release validation.
• Added schema coverage for seasonInfo.leagueStructureSpecialCases so the published football-data schema matches the generated dataset contract.

Validation

• Added release-notes:check, release-notes:check:all, release:check, and release:dry-run-data so release candidates can validate notes, docs output, and rebuilt data before publishing.
• Added integration:coverage to report unique-season fixture coverage, source modes, asserted tiers, assertion counts, and tagged scenario coverage without fetching live pages.
• Added a pre-release CI workflow that checks release notes, docs generation, type checking, linting, formatting, schema verification, and data verification.
• Tracked the current 2025:tier3 points-order exception explicitly so the release verifier can distinguish that source-order anomaly from ordinary table-order regressions.
• Added docs-site deployment gating for changes to release notes, docs-site generation, schemas, and package metadata after merge to main.

Consumer Notes

• No intentional schema break is included in this release.
• The new release-note pages make release details easier to inspect on the docs site; the GitHub release body should stay shorter and link to the full docs page.
• Integration coverage percentage means unique seasons with at least one live integration fixture. It does not mean every row or every club in those seasons has exhaustive assertions.

Known Limitations

• Lower-tier historical coverage still needs deeper vetting before every tier can be treated as equally mature.
• TypeScript migration is in progress; the codebase is not fully typed yet.
• Current tier6 and tier7 lower-tier metadata still needs follow-up review as part of the tier 5/6 hardening work.
• The live 2025-26 League One source currently orders Rotherham United above Port Vale while exposing fewer points for Rotherham; this is treated as a narrow source-order exception, not as a general relaxation of table-order validation.