refactor(api): split finding-groups status from muted state (#10630)

api/src/backend/tasks/tasks.py

@@ -771,26 +771,49 @@ def aggregate_finding_group_summaries_task(tenant_id: str, scan_id: str):
 )
 @set_tenant(keep_tenant=True)
 def reaggregate_all_finding_group_summaries_task(tenant_id: str):
-    """Reaggregate finding group summaries for all providers' latest completed scans."""
-    latest_scan_ids = list(
-        Scan.objects.filter(tenant_id=tenant_id, state=StateChoices.COMPLETED)
-        .order_by("provider_id", "-completed_at", "-inserted_at")
-        .distinct("provider_id")
-        .values_list("id", flat=True)
+    """Reaggregate finding group summaries for every (provider, day) combination.
+
+    Mirrors the unbounded scope of `mute_historical_findings_task`: that task
+    rewrites every Finding row whose UID matches a mute rule, with no time
+    limit. To keep the daily summaries consistent with that update, this task
+    re-runs the aggregator on the latest completed scan of every (provider,
+    day) pair that exists in the database. Tasks are dispatched in parallel
+    via a Celery group so the wallclock scales with the worker pool, not with
+    the number of pairs.
+    """
+    completed_scans = list(
+        Scan.objects.filter(
+            tenant_id=tenant_id,
+            state=StateChoices.COMPLETED,
+            completed_at__isnull=False,
+        )
+        .order_by("-completed_at")
+        .values("id", "completed_at", "provider_id")
     )
-    if latest_scan_ids:
+
+    # Keep the latest scan per (provider, day) pair so the daily summary row
+    # the aggregator writes is the most recent snapshot of that day for that
+    # provider. Iterating from most recent to oldest means the first scan we
+    # see for a given key wins.
+    latest_scans: dict[tuple, str] = {}
+    for scan in completed_scans:
+        key = (scan["provider_id"], scan["completed_at"].date())
+        if key not in latest_scans:
+            latest_scans[key] = str(scan["id"])
+
+    scan_ids = list(latest_scans.values())
+    if scan_ids:
         logger.info(
-            "Reaggregating finding group summaries for %d scans: %s",
-            len(latest_scan_ids),
-            latest_scan_ids,
+            "Reaggregating finding group summaries for %d scans (provider x day)",
+            len(scan_ids),
         )
         group(
             aggregate_finding_group_summaries_task.si(
-                tenant_id=tenant_id, scan_id=str(scan_id)
+                tenant_id=tenant_id, scan_id=scan_id
             )
-            for scan_id in latest_scan_ids
+            for scan_id in scan_ids
         ).apply_async()
-    return {"scans_reaggregated": len(latest_scan_ids)}
+    return {"scans_reaggregated": len(scan_ids)}
 
 
 @shared_task(base=RLSTask, name="lighthouse-connection-check")