GH-4950 LMDB: extensible ID scheme #7047

Job	Run time
formatting-and-quick-compile	1m 21s
copyright-check	31s
package-assembly	4m 22s
compile	3m 48s
frontend-unit-tests	24s
e2e	7m 26s
integration-tests	16m 44s
build (25)	33m 1s
slow-tests	27m 59s
	1h 35m 36s

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