v0.0.156 * update indexer for storage 0.0.156 * cli: fix max-message handling in the journal-client command * tests: fix test_metadata.py for frozen entities in swh.model.model * tests: update tests for storage>=0.0.155 * test_metadata typing: use type-specific mappings instead of cast * storage/db.py: drop unused format arg regconfig from query * typing: minimal changes to make a no-op mypy run pass