build

feat: fix the bug that custom db_class alters global metadata state #12

Job	Run time
Run Linters	1m 6s
test (3.11, ubuntu-latest)	16s
test (3.10, ubuntu-latest)	15s
test (3.12, ubuntu-latest)	15s
Indicate completion to coveralls.io	12s
Release	27s
	2m 31s

Provide feedback