Implement sut-prober PoC (#3)

Generator pass: build green, exit 0, deterministic re-run.
Catalog: 187 plugins, 16 json-configs, 17 assemblies.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

PROGRESS.md

@@ -25,10 +25,11 @@
 | 2026-04-07 | 초기 Sprint Contracts 5건 작성 | `docs/contracts/*.md` |
 | 2026-04-07 | SUT 카탈로그 v0 (정적) | `docs/sut-catalog/catalog.md`, `plugins.md` |
 | 2026-04-07 | 솔루션 스캐폴드(sut-prober PoC 타깃) | `recordingtest.sln`, `src/Recordingtest.SutProber/` |
+| 2026-04-07 | sut-prober PoC 구현 (Generator) | `src/Recordingtest.SutProber/`, `docs/sut-catalog/{plugins,json-configs,assemblies}.json` |
 
 ## In progress
 
-_(없음 — 다음 작업은 PLAN.md 상단에서 고른다)_
+- sut-prober PoC — Evaluator 채점 대기 (Generator 측 빌드/실행/결정성 확인 완료)
 
 ## Blocked