sfeos

Add support for optional enum queryables #1143

Job	Run time
Python 3.10 testing with elasticsearch7	1m 56s
Python 3.10 testing with elasticsearch8	1m 50s
Python 3.12 testing with elasticsearch8	1m 52s
Python 3.10 testing with opensearch	1m 51s
Python 3.12 testing with opensearch	1m 53s
Python 3.11 testing with elasticsearch8	2m 5s
Python 3.13 testing with opensearch	1m 50s
Python 3.13 testing with elasticsearch8	1m 50s
Python 3.11 testing with elasticsearch7	2m 4s
Python 3.12 testing with elasticsearch7	1m 49s
Python 3.9 testing with elasticsearch8	1m 54s
Python 3.9 testing with opensearch	1m 49s
Python 3.11 testing with opensearch	2m 4s
Python 3.13 testing with elasticsearch7	1m 53s
Python 3.9 testing with elasticsearch7	1m 55s
	28m 35s

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