Module Granary_catalogSource

In-memory catalog backed by system trees in the Store. System tree allocation: 0=_sys_tables, 1=_sys_columns, 2=_sys_indexes, 3=_sys_meta, 4=_sys_fts_tables, 5=_sys_views, 6=_sys_triggers, 7=_sys_catalog_mirror (#174 redundant schema copy). User tables and indexes use tree_ids >= 16.