WS3: surface evaluation internals (gap/rvol/per-criterion reasons)

- SetupEvaluationResult.criteria_detail: per-criterion {name,passed,reason}.
- watcher CriteriaEvaluatedEvent now carries gap_pct, relative_volume, status,
  reason, and the per-criterion detail (was only passed/failed names).
- CLI: 'inspect criteria SYMBOL' shows status + gap/rvol + each criterion reason;
  new 'inspect signals' = ready board + per-symbol gap/rvol/status.

Verified on real 2026-06-15 bars: RGNT shows 9/9 with reasons (rvol 26.2x),
'late' explained by the 10:30 ET cutoff. 67/67 tests green.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

runtime/watcher.py

@@ -204,6 +204,11 @@ class Watcher:
                         criteria_results={
                             "passed": evaluation.criteria_names_passed,
                             "failed": evaluation.criteria_names_failed,
+                            "detail": evaluation.criteria_detail,
+                            "gap_pct": evaluation.gap_pct,
+                            "relative_volume": evaluation.relative_volume,
+                            "status": evaluation.status,
+                            "reason": evaluation.reason,
                         },
                         total_criteria=evaluation.criteria_total,
                         passed_criteria=evaluation.criteria_passed,
@@ -212,6 +217,9 @@ class Watcher:
                             "symbol": symbol,
                             "success_score_pct": evaluation.success_score_pct,
                             "status": evaluation.status,
+                            "reason": evaluation.reason,
+                            "gap_pct": evaluation.gap_pct,
+                            "relative_volume": evaluation.relative_volume,
                         },
                     )
                 )