Report check-shorts progress

[seveibar]

Summary

• report input resolution and whether circuit JSON came from a prebuilt file, the current build cache, or a source render
• surface named async effects while source circuits are rendering or routing
• report checker loading, per-layer bitmap work, short-region detection, and debug-artifact generation
• throttle connectivity-group progress to roughly 10% increments to avoid noisy output
• add CLI coverage for high-level progress and structured checker events

Why

tsci check shorts can spend significant time rendering/routing a source circuit and rasterizing connectivity groups. With no intermediate output, the command looks like it has hung.

High-level phase messages work with the currently packaged fallback checker. Granular rasterization events use the optional progress API introduced by tscircuit/check-shorts#40.

Dependency sequencing

Merge and release tscircuit/check-shorts#40 so the CLI's dynamic latest import receives granular checker events. The CLI remains backward-compatible when the loaded checker does not emit progress.

Validation

• bunx tsc --noEmit
• bun test tests/cli/check — 18 tests passed
• bun test tests/cli/check/check-shorts.test.ts — 5 tests passed
• bun run format:check
• bun run build