Hola, Miguel.
I've also ported this question to a support case for further review.
My initial comments are below...
Best,
Dale
~~
This 'Designer' appears to be near or at end of life? If this is sunset functionality or application, I don't know that this is something we would pursue developing. Searching online and seeing "Oracle...stop Oracle 11g extended support on December 31st, 2020."
I'm not finding 'Designer' after this version (10g):
https://www.oracle.com/database/technologies/developer-tools/designer.html
I'm seeing that they do support a plugin to VS code for sql development, but I'm not initially seeing 'hooks' for source control via git.
https://docs.oracle.com/en/database/oracle/developer-tools-for-vscode/getting-started/gettingstarted.html
You may be able to find out more from your prospect, but I don't see external version control options from the information I was able to access.
As to what we could support: For customers that have managed sql updates in Oracle or other databases, we do support management and deployment of scripts and our deployment processes may exercise pre- or post-installation commands to apply updates.
Please let us know if you have more info available or have further questions and we can work through your support case.
Best,
Dale