fix(): fixed bugs with cache invalidation, notifications and guardrails

src/backend/apps/reports/services.py

@@ -117,6 +117,8 @@ def calculate_metric_value(
     variant_id: UUID,
     start_date: datetime | None = None,
     end_date: datetime | None = None,
+    event_start_date: datetime | None = None,
+    event_end_date: datetime | None = None,
 ) -> Decimal | None:
     rule = metric.calculation_rule
     decision_ids = _exposure_decision_ids(
@@ -129,20 +131,23 @@ def calculate_metric_value(
     if not decision_ids:
         return None
 
+    ev_start = event_start_date or start_date
+    ev_end = event_end_date or end_date
+
     metric_type = metric.metric_type
 
     if metric_type == MetricType.RATIO:
         numerator = _count_events(
             decision_ids,
             rule["numerator_event"],
-            start_date,
-            end_date,
+            ev_start,
+            ev_end,
         )
         denominator = _count_events(
             decision_ids,
             rule["denominator_event"],
-            start_date,
-            end_date,
+            ev_start,
+            ev_end,
         )
         if denominator == 0:
             return None
@@ -152,8 +157,8 @@ def calculate_metric_value(
         count = _count_events(
             decision_ids,
             rule["event"],
-            start_date,
-            end_date,
+            ev_start,
+            ev_end,
         )
         return Decimal(str(count))
 
@@ -162,8 +167,8 @@ def calculate_metric_value(
             decision_ids,
             rule["event"],
             rule["property"],
-            start_date,
-            end_date,
+            ev_start,
+            ev_end,
         )
 
     if metric_type == MetricType.PERCENTILE:
@@ -172,8 +177,8 @@ def calculate_metric_value(
             rule["event"],
             rule["property"],
             rule.get("percentile", 95),
-            start_date,
-            end_date,
+            ev_start,
+            ev_end,
         )
 
     return None