Add same-net trace merge phase

[tdashelby-cmyk]

/claim #29

Summary

• add a SameNetTraceMergeSolver pipeline phase after trace cleanup
• snap close, overlapping same-net internal horizontal/vertical trace segments onto a shared axis
• preserve routed endpoints and avoid different-net changes
• reject proposed merges that introduce new different-net intersections
• feed merged traces into downstream net label placement/example solving

Validation

• npx --yes bun test tests/solvers/SameNetTraceMergeSolver/SameNetTraceMergeSolver.test.ts
• .\node_modules\.bin\tsc.exe --noEmit
• npx --yes bun test
• npx --yes bun run build
• .\node_modules\.bin\biome.exe format on changed files

[vercel]

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Project	Deployment	Actions	Updated (UTC)
schematic-trace-solver	Ready	Preview, Comment	May 10, 2026 10:57pm