- v2-migration.md: add builder API key clarification note
- relayer/submit-a-transaction.md: document POST /submit now returns immediately without transactionHash
- relayer/get-a-transaction-by-id.md: add note to poll for onchain transactionHash after submission
- 249 files updated to match live docs.polymarket.com
- 14 URLs now return 404 (removed from live docs, local copies retained)
- New changelog entry: GET /markets and /events keyset pagination (Apr 10, 2026)