Transformers - Add sqlfluff workflow

[marcus-snx]

Add sqlfluff linting workflow (only for new changes using diff-quality).

[Tburm]

Is there any benefit to doing a one-time lint on the existing files? Did you test this? The workflow looks good but I'm wondering how many changes this would make.

[marcus-snx]

Is there any benefit to doing a one-time lint on the existing files? Did you test this? The workflow looks good but I'm wondering how many changes this would make.

Linting everything at once is possible (and there are good reasons for both doing it and not) with sqlfluff fix, but if we want to do it maybe it should be in a separate PR (I've had some troubles with fixing lint errors in the past on dbt projects). This workflow only adds a lint test (won't lint things automatically) for new and/or modified lines, not existing ones.