feat(validation): add paired rating-range evidence on current main

[seonghobae]

Why

Advances #579 / essay range compression. Stale long stack; surgical re-apply onto protected main.

What

• Rust core rating_range module with hand-calculated recovery contracts
• PyO3 binding module + Python paired_rating_range_evidence API
• Bound onto historical validation namespace without duplicating arithmetic
• Doctoring + changelog (APA 7th)

Verification

• Rust rating_range_evidence tests: 3 passed
• Product gates: python+rust+package+fuzz

Supersedes draft #579 once green.

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Review details

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Run ID: 0d42a3b3-de57-4b0e-9d8f-7dfb2a336ecb

📥 Commits

Reviewing files that changed from the base of the PR and between cd9e55f and 43b1f5f.

📒 Files selected for processing (15)

• CHANGELOG.md
• crates/fast-mlsirm-py/src/entrypoint.rs
• crates/fast-mlsirm-py/src/rating_range_bindings.rs
• crates/mlsirm-core/src/lib.rs
• crates/mlsirm-core/src/rating_range.rs
• crates/mlsirm-core/tests/rating_range_evidence.rs
• docs/changelog.d/397-paired-rating-range-evidence.md
• docs/doctoring/paired-rating-range-evidence.md
• docs/superpowers/plans/2026-08-09-paired-rating-range-evidence.md
• docs/superpowers/specs/2026-08-09-paired-rating-range-evidence-design.md
• python/fast_mlsirm/__init__.py
• python/fast_mlsirm/_rating_range_core_loader.py
• python/fast_mlsirm/rating_range.py
• tests/test_paired_rating_range_delegation.py
• tests/test_paired_rating_range_evidence.py

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