Dsdk

Update for replay tests with non-naive utc datetime and a location time zone.

Postgres provides the source clock as well as the defaults for AS_OF and TIME_ZONE when not provided in env variables.

Add Persistor as a component similar to Model to be instantiated directly or through a Mixin.
Add Postgres Mixin and Persistor.
Add contextmanagers to include both the pre and post argument parsing steps.
Push argument parsing details into the component classes and out of the mixins.
Push df_from_query and df_from_query_by_id into the Persistor classes to allow implementations to differ.
Eliminate unnecessary dict construction for dataframes.

Add Persistor as a component similar to Model to be instantiated directly or through a Mixin.
Add Postgres Mixin and Persistor.
Add contextmanagers to include both the pre and post argument parsing steps.
Push argument parsing details into the component classes and out of the mixins.
Push df_from_query and df_from_query_by_id into the Persistor classes to allow implementations to differ.
Eliminate unnecessary dict construction for dataframes.

Add Persistor as a component similar to Model to be instantiated directly or through a Mixin.
Add Postgres Mixin and Persistor.
Add contextmanagers to include both the pre and post argument parsing steps.
Push argument parsing details into the component classes and out of the mixins.
Push df_from_query and df_from_query_by_id into the Persistor classes to allow implementations to differ.
Eliminate unnecessary dict construction for dataframes.

Add Persistor as a component similar to Model to be instantiated directly or through a Mixin.
Add Postgres Mixin and Persistor.
Add contextmanagers to include both the pre and post argument parsing steps.
Push argument parsing details into the component classes and out of the mixins.
Push df_from_query and df_from_query_by_id into the Persistor classes to allow implementations to differ.
Eliminate unnecessary dict construction for dataframes.

Push control of logging configuration into the apps.
Expose mssql.CheckTablePrivileges and utils.configure_logger (was get_logger) as top-level dsdk imports. Hide the bad utils submodule name.