After the multi-repo migration, pre-existing github_pr_watches rows kept
repository_id='', so the orchestrator's reconciler (keyed on
(session_id, repository_id)) inserted a second watch under the resolved
id. Both watches polled independently and each created its own
github_task_prs row, surfacing as a "+2 PR" badge on legacy single-repo
tasks. Add a startup backfill mirroring backfillTaskPRsRepositoryID:
dedup the legacy '' rows where a per-repo row exists, then stamp the
remainder from task_repositories.
Co-authored-by: Kandev Agent <agent@kandev.dev>
Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>
João Salavisa
d8a9bb79d5