refactor(router): readability and type hints #11865

Job	Run time
changes	9s
integration-sqlite (capabilities_features, 8.1, main)	2m 17s
integration-sqlite (collaboration_features, 8.1, main)	1m 55s
integration-sqlite (comments_features, 8.1, main)	1m 54s
integration-sqlite (dav_features, 8.1, main)	38s
integration-sqlite (features, 8.1, main)	2m 10s
integration-sqlite (federation_features, 8.1, main)	39s
integration-sqlite (--tags ~@large files_features, 8.1, main)	2m 1s
integration-sqlite (filesdrop_features, 8.1, main)	35s
integration-sqlite (openldap_features, 8.1, main)	34s
integration-sqlite (openldap_numerical_features, 8.1, main)	2m 1s
integration-sqlite (ldap_features, 8.1, main)	35s
integration-sqlite (remoteapi_features, 8.1, main)	1m 58s
integration-sqlite (setup_features, 8.1, main)	2m 8s
integration-sqlite (sharees_features, 8.1, main)	30s
integration-sqlite (sharing_features, 8.1, main)	2m 20s
integration-sqlite (videoverification_features, 8.1, main)	2m 36s
integration-sqlite-summary	4s
	25m 4s

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