Support Fine‑Grained GitHub Access Tokens in FME Flow Version Control

Current situation: FME Flow’s Git integration relies on broad‑scope personal access tokens, which many security policies prohibit.
Why fine‑grained: Fine‑grained PATs were created to align access with what really matters—specific repositories, operations, and lifetimes—enforcing least‑privilege and reducing risk. This will make it easier to implement version control because current organizations like ours don’t allow broad scope.
Request: Add native support for GitHub fine‑grained PATs in FME Flow version control so teams can adopt it while meeting modern security policies.