[matejbolta]

Change

Pin public WCIF downloads to /wcif/version/2 for #92. Normalize the renamed personal-best and attempt values once at the API boundary so existing psych sheets, personal records and result views retain their helper contracts. Preserve v2 participation rules, linked rounds, qualification fields, schedules, assignments and extensions; do not reinterpret round best/average, WCA Live or the separate results API.

Regression coverage checks public endpoint selection, numeric sentinels/MBLD values, linked-round advancement, field preservation and unexpected/malformed input. Includes helper type additions for linked rounds and result-condition scope. No #91/cache-refresh fix or unrelated behavior changes.

Validation

• Jest: 37 suites, 175 tests, 2 snapshots passed.
• TypeScript check and Vite production build passed.
• Lint: 0 errors, 4 existing warnings.
• Read-only public endpoint comparison on 2026-11-02: SlovenianNationals2026 still responds on both v1.1 and v2.2. All 2,775 personal bests and 9,048 attempts match after normalization. This does not claim v1 has already been shut down.

Closes #92.

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