I had a boss once with a similar viewpoint, so I learned from him how they automated database deployments for Java/Scala apps using Liquibase+Maven and found I

I had a boss once with a similar viewpoint, so I learned from him how they automated database deployments for Java/Scala apps using Liquibase+Maven and found I could apply and integrate the same principles to testing and deploying a data-layer stored procedure engine I had previously built into a joint product we were building together. For that project I was able to put SQL DDL+DML+stored procedures in version control, create/run stored procedure (TDD even) unit/integration tests on mock data against other stored procedures, had pass-fail testing/deployment in my CICD tool right alongside native app code, and did some rollback support (although that was more trouble than I think it was worth), all using Liquibase change sets (+git+Jenkins). Flyway could also have worked but we were using Liquibase. It did require some creative thinking to apply changesets and preconditions and post conditions and ability to have stored procedures execute and read results of other stored procedures. Last I checked, the system had been used over many years to process/evaluate $50 billion in order transactions.