Change github ids to bigint

[gonzaM]

Change GitHub IDs to bigint

Problem

GitHub IDs can sometimes exceed the maximum value that can be stored in a 32-bit integer. This caused integer overflow errors when attempting to store large GitHub IDs in our database.

Changes

• Changed github_id column type from integer to bigint in:
  • events_pull_request_comments
  • events_review_comments
  • events_reviews
  • repositories