fix: ensure stop_span/0 always returns :ok (#139) #314

Job	Run time
ash-ci / audit	19s
ash-ci / Community Files Check	3s
ash-ci / mix igniter.upgrade	4s
ash-ci / Report Mix Dependencies	17s
ash-ci / REUSE compliance	7s
ash-ci / MIX_ENV=test mix.compile	2m 31s
ash-ci / MIX_ENV=dev mix.compile	2m 14s
ash-ci / mix dialyzer	5m 23s
ash-ci / mix credo --strict	2m 55s
ash-ci / mix test	1m 48s
ash-ci / mix sobelow	32s
ash-ci / mix spark.formatter --check	5s
ash-ci / mix spark.cheat_sheets --check	34s
ash-ci / mix format --check-formatted	35s
ash-ci / mix ash.codegen --check	0s
ash-ci / mix doctor --full --raise	0s
ash-ci / mix deps.unlock --check-unused	0s
ash-ci / mix git_ops.check_message	0s
ash-ci / mix docs	2m 17s
ash-ci / Deploy docs to GitHub pages.	10s
ash-ci / NIF ${{ matrix.nif }} - ${{ matrix.job.target }} (${{ matrix.job.os }})	0s
ash-ci / Release	0s
	19m 54s

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