fix(forget): populate retention groups for manual runs

internal/server/http/maintenance_dispatch.go

@@ -37,7 +37,12 @@ func (s *Server) DispatchMaintenance(ctx context.Context, decisions []maintenanc
 		}
 		switch d.Kind {
 		case "forget":
-			payload, ok := s.buildForgetPayloadForHost(ctx, d.HostID)
+			payload, ok, err := s.buildForgetPayloadForHost(ctx, d.HostID)
+			if err != nil {
+				slog.Warn("maintenance: list source groups failed",
+					"host_id", d.HostID, "err", err)
+				continue
+			}
 			if !ok {
 				slog.Info("maintenance: forget skipped — no source groups with retention",
 					"host_id", d.HostID)
@@ -88,11 +93,10 @@ func (s *Server) DispatchMaintenance(ctx context.Context, decisions []maintenanc
 // that has a non-empty retention policy and builds a CommandRunPayload
 // with ForgetGroups populated. Returns ok=false if the host has no
 // such groups (the dispatcher then skips this kind).
-func (s *Server) buildForgetPayloadForHost(ctx context.Context, hostID string) (api.CommandRunPayload, bool) {
+func (s *Server) buildForgetPayloadForHost(ctx context.Context, hostID string) (api.CommandRunPayload, bool, error) {
 	groups, err := s.deps.Store.ListSourceGroupsByHost(ctx, hostID)
 	if err != nil {
-		slog.Warn("maintenance: list source groups failed", "host_id", hostID, "err", err)
-		return api.CommandRunPayload{}, false
+		return api.CommandRunPayload{}, false, err
 	}
 	fg := make([]api.ForgetGroup, 0, len(groups))
 	for _, g := range groups {
@@ -105,9 +109,9 @@ func (s *Server) buildForgetPayloadForHost(ctx context.Context, hostID string) (
 		})
 	}
 	if len(fg) == 0 {
-		return api.CommandRunPayload{}, false
+		return api.CommandRunPayload{}, false, nil
 	}
-	return api.CommandRunPayload{ForgetGroups: fg}, true
+	return api.CommandRunPayload{ForgetGroups: fg}, true, nil
 }
 
 func isEmptyRetention(p store.RetentionPolicy) bool {