fix(output): preserve tail lines to prevent CI summary loss (#1035)

[ousamabenyounes]

Summary

Fixes #1035

• make.toml had max_lines = 50 which kept only the first 50 lines of filtered output, discarding the tail where CI tools (pytest, vitest) always print their pass/fail summaries
• truncate_output() in src/parser/mod.rs kept only the head chars in passthrough mode, causing the same summary loss when the vitest JSON parser falls through to Tier 3
• Both now use head + last 20 lines with an omission marker so CI results are always visible regardless of how long the full output is

Test plan

• cargo fmt --all && cargo clippy --all-targets && cargo test
• New test test_truncate_output_preserves_tail — 101-line CI output, verifies "251 passed, 18 skipped" survives truncation
• New test test_truncate_output_tail_shows_last_20_lines — 50-line output, all 20 summary lines appear in tail
• New TOML test "preserves tail for long composite output" — 51 filtered make lines, head=20 + omit(1) + tail=30
• Existing tests all pass (1375 pass, 0 fail, 0 regressions)
• Baseline was 1373; +2 from new tests

Files changed

File	Change
src/filters/make.toml	Replace max_lines = 50 with head_lines = 20, tail_lines = 30; add tail-preservation test case
src/parser/mod.rs	Update truncate_output() to show head + tail with omission marker; add 2 new tests

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Vibe coded by ousamabenyounes

[pszymkowiak]

[w] wshm · Automated triage by AI

📊 Automated PR Analysis

🐛 Type	bug-fix
🟢 Risk	low

Summary

Fixes CI summary loss by updating both make.toml and truncate_output() in src/parser/mod.rs to preserve tail lines of output. Previously, only the first N lines/chars were kept, discarding the pass/fail summaries that CI tools print at the end. Now a head + tail strategy with an omission marker ensures summaries are always visible.

Review Checklist

• Tests present
• Breaking change
• Docs updated

Linked issues: #1035

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Analyzed automatically by wshm · This is an automated analysis, not a human review.