CI that tests against prod bronze deadlocks when a PR adds a new source

A CI job that runs dbt build into a CI schema reading the deployed prod bronze tables (--vars '{bronze_schema: prod}') fails with TABLE_OR_VIEW_NOT_FOUND the moment a commit adds a new bronze source: the table is only created by the deploy, and the deploy only runs after CI passes (workflow_run on CI success). Guarding only the original bronze table is not enough. Check every source in a loop (databricks tables exists <cat.schema.t> -o json | jq -r .table_exists) and skip the dbt step with a ::notice:: when any is missing; the first deploy creates it and later pushes build fully. Alternative: build bronze in CI too, or seed the CI schema from fixtures.