fix(prune): preserve case-equivalent GitHub dependencies - #3158

Advisory evidence only. This check never authorizes implementation or merge.

State: needs-evidence. Candidate issue links are metadata, not proof the implementation matches scope. Fresh human confirmation remains required.

• Issue #3034: needs-evidence. Nominate one current approval comment per issue.

A current comment scan cannot detect a deleted withdrawal. Confirm current bounded scope,
implementation-to-scope match and review support with a responsible human.
Use CONTRIBUTING.md and the trusted default-branch GOVERNANCE.md roster.
Private security tracking stays private. No labels, milestones or code reviews substitute for scope approval.