fix: fully traverse nested map & union types #1373

Job	Run time
ash-ci / audit	43s
ash-ci / mix deps.get	16s
ash-ci / mix igniter.upgrade	3s
ash-ci / MIX_ENV=test mix.compile	48s
ash-ci / mix docs	2m 9s
ash-ci / MIX_ENV=dev mix.compile	26s
ash-ci / mix ash.codegen --check	0s
ash-ci / mix credo --strict	42s
ash-ci / mix dialyzer	3m 58s
ash-ci / mix format --check-formatted	40s
ash-ci / mix sobelow	50s
ash-ci / mix spark.cheat_sheets --check	43s
ash-ci / mix spark.formatter --check	49s
ash-ci / mix test	1m 12s
ash-ci / mix deps.unlock --check-unused	43s
ash-ci / Deploy docs to GitHub pages.	17s
ash-ci / NIF ${{ matrix.nif }} - ${{ matrix.job.target }} (${{ matrix.job.os }})	0s
ash-ci / Release	0s
	14m 19s

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