chore: Resolve clippy collapsible_match failure in seq_len_from_cigar

[Copilot]

The CI lint job failed on clippy::collapsible_match in src/bam/ext.rs, blocking the workflow run linked in the issue. This change applies a minimal refactor to the flagged match arm while preserving sequence length semantics.

• Lint-fix scope (minimal, behavior-preserving)

  • Replaced nested if include_hard_clip inside the Cigar::HardClip arm with a guarded match arm.
  • No logic changes outside seq_len_from_cigar.

• Why this matters

  • Aligns the implementation with strict CI clippy settings (-D clippy::all) for this code path.
  • Keeps hard-clip inclusion behavior explicit at pattern-match level.

match entry {
    Cigar::HardClip(len) if include_hard_clip => {
        result += len;
    }
    // ...
}

[coveralls]

Coverage Report for CI Build 31882266962

Coverage decreased (-0.005%) to 82.129%

Details

• Coverage decreased (-0.005%) from the base build.
• Patch coverage: 2 of 2 lines across 1 file are fully covered (100%).
• No coverage regressions found.

Uncovered Changes

No uncovered changes found.

Coverage Regressions

No coverage regressions found.

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Coverage Stats

Relevant Lines:	3391
Covered Lines:	2785
Line Coverage:	82.13%
Coverage Strength:	27266.79 hits per line

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💛 - Coveralls