fix: remove extra trace lines in post-processing (repro78)

[CuboYe]

Summary

• add a focused repro test for issue Fix extra trace lines in post-processing step #78 using the DISCH fixture with schMaxTraceDistance=6
• assert duplicate raw segments exist in solver traces (bug repro)
• add post-processing trace line dedupe per globalConnNetId + segment

Verification

• bun test tests/solvers/SchematicTracePipelineSolver/SchematicTracePipelineSolver_repro78.test.ts
• bun test

Closes #78
/claim #78

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Project	Deployment	Actions	Updated (UTC)
schematic-trace-solver	Ready	Preview, Comment	Mar 3, 2026 10:34pm

[CuboYe]

Quick follow-up: this PR is ready for maintainer review/merge on my side. Happy to make any requested changes immediately.

[CuboYe]

Friendly ping on this stale PR (>48h): still ready for review/merge on my side, and I can apply any requested changes immediately. 🙏

[CuboYe]

Quick stale-lane follow-up: this PR is still ready for review/merge on my side. Happy to apply any requested tweaks right away.

[CuboYe]

Maintainer ping for stale lane triage: this fix PR remains ready on contributor side (scoped change, green checks, reproducible). If any tweak is needed to merge, I can push it immediately.

[CuboYe]

Stale-lane maintainer ping: still merge-ready on contributor side with scoped fix and green checks. If there is a preferred adjustment before merge, I can ship it quickly.

[CuboYe]

Maintainer triage ping for stale lane (>48h): this PR is still merge-ready on contributor side (scoped fix + green checks). If there’s any merge blocker, share it and I’ll patch immediately.

[CuboYe]

Quick Friday expanded-pool follow-up: this PR has been open ~10 days and is ready for maintainer review. Happy to revise quickly if anything blocks merge. 🙏

[CuboYe]

Maintainer stale-lane ping (>48h): this PR remains merge-ready on contributor side (scoped fix + green checks). If any change is needed to merge, I can push it immediately.

[CuboYe]

Maintainer stale-lane ping (>48h): this PR remains merge-ready on contributor side (scoped fix + green checks). To help unblock review, I can push an immediate reviewer-friction reduction update (extra regression test or tighter repro doc) if you share preferred direction.