fix: Clickhouse conversion of `Null`, `Text` and `Decimal` (#2466) #1509

Job	Run time
Prepare	12s
Release Linux binary for aarch64	6m 35s
Release binary for macOS silicon (macos-12, aarch64-apple-darwin, dozer, dozer-macos-aarch64)	28m 25s
Release (ubuntu-20.04)	6m 26s
Release (macos-12, dozer, x86_64-apple-darwin, dozer-macos-amd64)	5m 32s
	47m 10s

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