FAI-13036: Extend schema to for Copilot in Faros GitHub connector

[chalenge]

Description

• Adds tables to ensure we can write all sources from Faros GitHub source
• Fixed migration v012, which had a file name typo hence didn't run

Type of change

(Delete what does not apply)

• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

Checklist

(Delete what does not apply)

• Have you checked that there aren't other open Pull Requests for the same update/change?
• Have you lint your code locally before submission?
• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you written new tests for your core changes, as applicable?
• Have you successfully run tests with your changes locally?

[thomas-gerber]

LGTM modulo what I asked @chalenge to check on SaaS/CE schema drift