Rename PostgreSQL backend and code styling
Fix bugs in ProvenanceStoragePostgreSql class
location_get
was decoding paths to string instead of returning bytes directly as the interface requires.
revision_get
was exposing internal origins id instead of joining with the origin
table to retrive their sha1s.
Fix module requirements
types-Werkzeug
is only required for testing.
Depends on !71 (closed).
Migrated from D6084 (view on Phabricator)