feat(insights): hit-rate breakdown by detector kind

Adds a "By detector kind" breakdown to the anomaly outcome report + Insights page,
answering "which directional detector actually wins?". Only directional kinds
(SuspensionFlip, SteamMove) resolve to hit/miss, so the breakdown naturally shows
just those — mirrors the existing by-sport / by-severity bucketers and rendering.

- AnomalyOutcomeReport.ByKind + EvaluateAnomalyOutcomesUseCase.BuildKindBuckets
  (keyed OutcomeBucketKeys.KindPrefix + enum name); threaded through the insights VM/service.
- Insights page: new section + BucketRenderKind.Kind label case (resolves the enum name
  to the Anomaly.Kind.* resx); en/ru section heading.
- 2 tests: empty-report ByKind + directional-kind grouping.

src/Marathon.Application/UseCases/EvaluateAnomalyOutcomesUseCase.cs

@@ -124,6 +124,7 @@ public sealed class EvaluateAnomalyOutcomesUseCase
             BySeverity: BuildSeverityBuckets(resolvedOrdered),
             BySport: BuildSportBuckets(resolvedOrdered),
             ByScoreBin: BuildScoreBins(resolvedOrdered),
+            ByKind: BuildKindBuckets(resolvedOrdered),
             Resolved: resolvedOrdered,
             Unresolved: unresolvedOrdered,
             EventTitles: eventTitles);
@@ -171,6 +172,20 @@ public sealed class EvaluateAnomalyOutcomesUseCase
             .ToList();
     }
 
+    private static IReadOnlyList<OutcomeBucket> BuildKindBuckets(
+        IReadOnlyCollection<ResolvedAnomaly> resolved)
+    {
+        // Only directional kinds resolve to a hit/miss (the evaluator leaves the rest
+        // Unresolved), so this naturally shows just the directional detectors.
+        return resolved
+            .GroupBy(r => r.Kind)
+            .OrderBy(g => (int)g.Key)
+            .Select(g => BuildBucket(
+                key: OutcomeBucketKeys.KindPrefix + g.Key,
+                items: g))
+            .ToList();
+    }
+
     private static IReadOnlyList<OutcomeBucket> BuildScoreBins(
         IReadOnlyCollection<ResolvedAnomaly> resolved)
     {
@@ -239,6 +254,7 @@ public sealed class EvaluateAnomalyOutcomesUseCase
             BySeverity: Array.Empty<OutcomeBucket>(),
             BySport: Array.Empty<OutcomeBucket>(),
             ByScoreBin: Array.Empty<OutcomeBucket>(),
+            ByKind: Array.Empty<OutcomeBucket>(),
             Resolved: Array.Empty<ResolvedAnomaly>(),
             Unresolved: Array.Empty<ResolvedAnomaly>(),
             EventTitles: new Dictionary<DomainEventId, string>());