Migrate joins to sqlalchemy's query options

Use native pandas read_sql_query and geopandas from_postgis
Fix definiiton of status in models
Fix table names
Fix category fields

src/gisaf/redis_tools.py

@@ -395,12 +395,11 @@ class Store:
                 for store_name in missing_triger_tables:
                     ## XXX: TODO: See https://stackoverflow.com/questions/7888846/trigger-in-sqlachemy
                     model = registry.geom[store_name]
-
                     try:
                         await session.exec(text(
                             ttag_create_trigger.format(
-                                schema=model.metadata.schema,
-                                table=model.__tablename__)
+                                schema=model.__table__.schema,
+                                table=model.__table__.name)
                         ))
                     except UndefinedTableError:
                         logger.warning(f'table {store_name} does not exist in '