* ci: restructure lint, unit and smoke workflows
* ci: preserve source formatting in tier workflows
* ci: retire per-shard coverage flags and tighten the tier workflow guards
* test(ci): freeze the workflow startup safety models
* ci: keep the current required check names running until the ruleset moves to the tier collectors
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Co-authored-by: yuneng <yuneng@berri.ai>
* ci(unit): add unit passed collector job and fold proxy-db shards into test-unit.yml
* test(ci): cover the unit passed gate's success, failure, cancelled and skipped results
* test(ci): run the unit passed gate test from the code quality workflow
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Co-authored-by: yuneng <yuneng@berri.ai>
