Respect PCB keepout component exclusions

[seveibar]

Summary

• read resolved excluded_pcb_component_ids from PCB keepouts
• map excluded components to their PCB ports, SMT pads, and plated holes
• skip only trace/keepout DRC violations where connectivity proves the trace belongs to an excluded component
• keep unrelated trace violations against the same keepout intact

Why

Keepout overlap diagnostics are generated in @tscircuit/checks, so the exemption belongs here rather than in core's Board-level post-processing. This makes the behavior consistent for every consumer of the checks package and removes dependence on generated error-ID formatting.

Dependencies and follow-up

• uses circuit-json@^0.0.457, released from Add resolved component exclusions to PCB keepouts circuit-json#670
• consumed by Serialize keepout excludeRefs as PCB component IDs core#2958, which resolves TSX selectors and serializes the component IDs

Validation

• bun test — 133 passed, 0 failed
• bunx tsc --noEmit
• bun run build
• Biome check on changed files

[tscircuitbot]

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Thank you for your contribution! 🎉

PR Rating: ⭐⭐
Impact: Minor

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