* ci(unit): fetch the merge base by sha for the db-and-spend schema check instead of cloning full history
* ci(unit): read the schema check arguments through one typed mapping
* ci(unit): give the schema check its own step with the ui-unit base fallback and register it with the merge-base step test
* ci(unit): keep the setup ceiling at 35 minutes, the install step never took over 33 seconds
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Co-authored-by: devin-ai-integration[bot] <158243242+devin-ai-integration[bot]@users.noreply.github.com>
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