test: rebuild lesson probe e2e for snapshot pipeline

[midagedev]

Summary

• rebuilt lesson probe regression e2e to inject full probe snapshots (injectProbeState) instead of V1 per-metric marker injections
• replaced mission row title matching with deterministic index-based selection to avoid duplicate-title misselection flake
• removed force-complete fallback and now fail with explicit mission/rule/status debug context when regression occurs
• expanded bridge helper typing for snapshot injection and scheduler debug fields

Verification

• npm run typecheck
• npm run test
• npm run lint
• npm run test:e2e:lessons

Closes #69

[midagedev]

Reviewer pass 1: 스냅샷 주입 경로 전환, 미션 선택 안정화, 실패 디버그 정보 강화까지 확인했습니다. 블로킹 이슈 없습니다.

[midagedev]

Reviewer pass 2: 추가 보완 없이 머지 진행 가능합니다.