backfill-duplicate-comments.ts hard-codes owner and repo (not portable across forks)

Question

## Bug

scripts/backfill-duplicate-comments.ts lines 89-90 have owner and repo hard-coded as anthropics and claude-code instead of reading from environment variables like other scripts.

backfill-duplicate-comments.ts hard-codes owner and repo (not portable across forks)

Bug\n\nscripts/backfill-duplicate-comments.ts lines 89-90 have owner and repo hard-coded as anthropics and claude-code instead of reading from environment variables like other scripts.