feat: Inline context for custom and migration events (#63) #77

Job	Run time
test-packaging	3m 9s
test-contract-tests	2m 49s
test-platforms-and-versions (ubuntu-latest, 8)	2m 23s
test-platforms-and-versions (ubuntu-latest, 11)	2m 21s
test-platforms-and-versions (ubuntu-latest, 17)	2m 27s
test-platforms-and-versions (ubuntu-latest, 19)	2m 18s
	15m 27s

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