sfeos

Add support for optional enum queryables #1149

Job	Run time
Python 3.9 testing with elasticsearch8	1m 54s
Python 3.9 testing with elasticsearch7	1m 54s
Python 3.10 testing with elasticsearch7	1m 53s
Python 3.10 testing with opensearch	1m 47s
Python 3.9 testing with opensearch	1m 52s
Python 3.10 testing with elasticsearch8	1m 50s
Python 3.12 testing with opensearch	2m 1s
Python 3.13 testing with elasticsearch7	1m 46s
Python 3.13 testing with opensearch	1m 52s
Python 3.11 testing with elasticsearch8	2m 12s
Python 3.12 testing with elasticsearch7	1m 55s
Python 3.12 testing with elasticsearch8	1m 53s
Python 3.13 testing with elasticsearch8	1m 52s
Python 3.11 testing with opensearch	2m 11s
Python 3.11 testing with elasticsearch7	2m 9s
	29m 1s

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