change postgres to bigserial #658

Job	Run time
build-and-test-nflow-explorer	50s
javadoc-spotbugs-codeql	2m 42s
build-and-test (17)	1m 4s
integration-tests (17, h2)	3m 48s
build-and-test (21)	1m 9s
integration-tests (17, mariadb)	4m 5s
build-and-test (22)	1m 19s
integration-tests (17, postgresql)	4m 1s
integration-tests (17, mysql)	4m 4s
integration-tests (17, sqlserver)	4m 0s
integration-tests (17, db2)	4m 2s
integration-tests (17, oracle)	4m 3s
integration-tests (21, h2)	3m 43s
integration-tests (21, mariadb)	4m 2s
integration-tests (21, postgresql)	4m 3s
integration-tests (21, mysql)	4m 1s
integration-tests (21, sqlserver)	3m 59s
integration-tests (21, db2)	4m 2s
integration-tests (21, oracle)	4m 1s
	1h 2m 58s

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