Fix OAuth code exchange and go lint

Authorization-code exchange used ExternalClientID, which
is empty for registered clients and broke e2e token
grants. Pass the authenticated client's GID instead.

Also satisfy wsl_v5 blank-line rules, wire the delete
reference dialog through its mutation hook, and name the
filemanager logger.

Signed-off-by: Bryan Frimin <bryan@probo.com>

pkg/probod/probod.go

@@ -378,7 +378,7 @@ func (impl *Implm) Run(
 		return err
 	}
 
-	fileManagerService := filemanager.NewService(pgClient, baseURL, s3Client, l)
+	fileManagerService := filemanager.NewService(pgClient, baseURL, s3Client, l.Named("filemanager"))
 
 	commonThirdPartyEnrichmentCfg, err := impl.buildCommonThirdPartyEnrichmentConfig(l, tp, r, fileManagerService)
 	if err != nil {