Validate fight totals into trusted, warning, and quarantine states

[komaksym]

Parent

• Implement auditable UFC dataset fidelity pipeline #14 — Implement auditable UFC dataset fidelity pipeline

What to build

Create the central validation boundary for normalized fight totals. It must return machine-readable checks and preserve raw evidence while separating trusted, warning, and quarantined fight records.

Acceptance criteria

• Every fight-total check emits a stable code, check_result=pass|fail|not_checked, a severity, and a reason when the result is not_checked.
• Fight totals receive exactly record_state=valid|warning|quarantined; not_checked is never treated as a record state.
• Required identity, canonical outcome, numeric ratio, non-negative value, landed-not-greater-than-attempted, percentage-range, and placeholder/zero-denominator rules are enforced without clipping or imputing source values.
• Quarantine records retain the source key, provenance, failed check codes, severity, result, observed values, and propagation target.
• Trusted all-bouts output excludes quarantined fight totals, retains warning totals, and preserves red wins, blue wins, draws, and no contests.
• Fixture tests cover valid, warning, hard-invalid, not_checked, missing-ID, malformed-ratio, impossible-count, and conflicting-outcome cases.

Blocked by

• Make stable UFCStats identity authoritative end to end #15 — Make stable UFCStats identity authoritative end to end.