Replace citation_year with deposition_date across the database.

[rtviii]

Not all authors choose to include the citation in the deposition, hence we have about a 100 of sturctures floating around without a date and some are off.
Add to this:

riboxyz/ribctl/etl/gql_querystrings.py

Lines 24 to 50 in cb8a732

	entry_info_string = """
	struct_keywords {
	pdbx_keywords
	text
	}
	rcsb_entry_info {
	resolution_combined
	}
	rcsb_external_references {
	link
	type
	id
	}
	exptl {
	method
	}
	citation {
	rcsb_authors
	year
	title
	pdbx_database_id_DOI
	}
	struct_keywords {
	pdbx_keywords
	text
	}
	"""

The following gql query

rcsb_accession_info{
    has_released_experimental_data
    deposit_date
}

Propagate down the ETL pipeline. Add a "--metadata_only" flag to the ribd.py etl profile option s.t. you don't have to trigger polymer reclassification when this new date is added. Change filters in the database and frontend accordingly.