test(inference): cover signed non-finite uncertainty

[seonghobae]

Summary

Follow up on merged PR #725 to close the review findings that were not present in its merged tree:

• add stable AERA and Casella/Berger links with source-specific rationale;
• cover signed negative infinity in the Python, public-wrapper, direct-Rust, and Rust unit contracts;
• refresh the authoritative CHANGELOG generated from the current fragment set.

Validation

• ....... [100%]
  7 passed in 0.47s (7 passed)

running 4 tests
test inference::tests::standard_errors_preserve_nonfinite_diagonals ... ok
test inference::tests::nonfinite_hessian_fails_closed ... ok
test inference::tests::inverts_diagonal_information ... ok
test inference::tests::singular_matrix_uses_pseudoinverse_identity ... ok

test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 1073 filtered out; finished in 0.00s

running 0 tests

test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 2 filtered out; finished in 0.00s

running 0 tests

test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 9 filtered out; finished in 0.00s

running 0 tests

test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 1 filtered out; finished in 0.00s

running 0 tests

test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 2 filtered out; finished in 0.00s

running 0 tests

test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 1 filtered out; finished in 0.00s

running 0 tests

test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 2 filtered out; finished in 0.00s

running 0 tests

test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 3 filtered out; finished in 0.00s (4 passed)

• All checks passed!

This is intentionally a separate follow-up because #725 is already merged.

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⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro Plus

Run ID: 076c6045-7d84-48b6-b4fc-9bbe08d867a2

📥 Commits

Reviewing files that changed from the base of the PR and between 3bc1222 and 078e40a.

📒 Files selected for processing (4)

• CHANGELOG.md
• crates/mlsirm-core/src/inference.rs
• docs/doctoring/inference_nonfinite_uncertainty.md
• tests/test_inference_nonfinite_uncertainty.py

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