Add diff ingester, increase test coverage #8036

Job	Run time
build / Verify build	2m 2s
compose-migrate / docker	2m 49s
image-build / Build Helm chart	3m 29s
image-build / Image build	3m 20s
license-check / License boilerplate check	12s
image-build / Check docker image build	2m 18s
lint / Run golangci-lint	3m 14s
security / Security Scan	15s
lint / Uncommitted changes check - go mod tidy & make gen	3m 31s
test / Authz tests	2m 51s
test / Unit testing	9m 58s
	33m 59s

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