Add initial support for identity columns #441

Job	Run time
Cabal Check	48s
Formatting Check	55s
Cabal Build	3m 38s
Build and Test (pg13, stack-lts-18.28-ghc-8.10.7.yaml)	2m 52s
Build and Test (pg13, stack-lts-19.33-ghc-9.0.2.yaml)	2m 43s
Build and Test (pg13, stack-lts-20.26-ghc-9.2.8.yaml)	2m 40s
Build and Test (pg13, stack-lts-21.22-ghc-9.4.8.yaml)	2m 26s
Build and Test (pg13, stack-lts-22.28-ghc-9.6.6.yaml)	2m 22s
Build and Test (pg13, stack-nightly-2024-12-17-ghc-9.10.1.yaml)	2m 26s
Build and Test (pg13, stack.yaml)	2m 39s
Build and Test (pg17, stack-lts-18.28-ghc-8.10.7.yaml)	2m 37s
Build and Test (pg17, stack-lts-19.33-ghc-9.0.2.yaml)	2m 36s
Build and Test (pg17, stack-lts-20.26-ghc-9.2.8.yaml)	2m 36s
Build and Test (pg17, stack-lts-21.22-ghc-9.4.8.yaml)	2m 37s
Build and Test (pg17, stack-lts-22.28-ghc-9.6.6.yaml)	2m 32s
Build and Test (pg17, stack-nightly-2024-12-17-ghc-9.10.1.yaml)	2m 18s
Build and Test (pg17, stack.yaml)	2m 35s
Build and Test (pg14, stack.yaml)	2m 37s
Build and Test (pg15, stack.yaml)	2m 39s
Build and Test (pg16, stack.yaml)	2m 35s
	49m 11s

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