세션 평가와 교수자 분석 보강

apps/api/app/services/session_metrics.py

@@ -164,6 +164,7 @@ def build_learner_growth(
     *,
     learner_label: Callable[[str], str],
     limit: int | None = None,
+    point_limit: int | None = 6,
 ) -> list[LearnerGrowthMetrics]:
     grouped: dict[str, list[InProcSession]] = {}
     for sess in sessions:
@@ -222,7 +223,7 @@ def build_learner_growth(
                 avg_rapport=avg([value for value in rapport_values if value is not None]),
                 trend=trend,
                 top_techniques=top_techniques,
-                points=points[-6:],
+                points=points if point_limit is None else points[-point_limit:],
             )
         )
     sorted_result = sorted(result, key=lambda item: item.latest_at, reverse=True)