LogDog: Use per-project settings for archival.

server/internal/logdog/service/service.go

Index: server/internal/logdog/service/service.go
diff --git a/server/internal/logdog/service/service.go b/server/internal/logdog/service/service.go
index 8ce74b8dca157982849adbcecb5b5cd6155cdb60..711043e21056534df6826ed2558292b1c7a3a91c 100644
--- a/server/internal/logdog/service/service.go
+++ b/server/internal/logdog/service/service.go
@@ -19,6 +19,7 @@ import (
 	"github.com/luci/luci-go/client/authcli"
 	"github.com/luci/luci-go/common/api/logdog_coordinator/services/v1"
 	"github.com/luci/luci-go/common/auth"
+	luciConfig "github.com/luci/luci-go/common/config"
 	"github.com/luci/luci-go/common/gcloud/gs"
 	log "github.com/luci/luci-go/common/logging"
 	"github.com/luci/luci-go/common/logging/gologger"
@@ -309,6 +310,13 @@ func (s *Service) Config() *svcconfig.Config {
 	return s.config.Config()
 }
 
+// ProjectConfig returns the cached project configuration.
+//
+// If the project configuration is not available, nil will be returned.
+func (s *Service) ProjectConfig(c context.Context, proj luciConfig.ProjectName) (*svcconfig.ProjectConfig, error) {
+	return s.config.ProjectConfig(c, proj)
+}
+
 // Coordinator returns the cached Coordinator client.
 func (s *Service) Coordinator() logdog.ServicesClient {
 	return s.coord