fix: ensure single agg query has bindings #438

Job	Run time
ash-ci / mix deps.get	16s
ash-ci / audit	35s
ash-ci / mix igniter.upgrade	3s
ash-ci / MIX_ENV=test mix.compile	30s
ash-ci / mix ash.codegen --check	0s
ash-ci / mix credo --strict	3s
ash-ci / MIX_ENV=dev mix.compile	24s
ash-ci / mix docs	1m 49s
ash-ci / mix dialyzer	3m 19s
ash-ci / mix spark.cheat_sheets --check	25s
ash-ci / mix format --check-formatted	22s
ash-ci / mix spark.formatter --check	6s
ash-ci / mix sobelow	23s
ash-ci / mix test	1m 0s
ash-ci / mix deps.unlock --check-unused	24s
ash-ci / Deploy docs to GitHub pages.	8s
ash-ci / NIF ${{ matrix.nif }} - ${{ matrix.job.target }} (${{ matrix.job.os }})	0s
ash-ci / Release	0s
	9m 47s

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