Update Polymarket documentation - March 27, 2026

Added 19 new documentation pages:
- Rebates API: get-current-rebated-fees-for-a-maker
- Relayer API: 7 new endpoints (safe check, transactions, nonce, API keys)
- Rewards API: 6 new endpoints (earnings, configurations, percentages)
- Data API: get-midpoint-price (replaces empty market-data version)
- Resources: blockchain-data, referral-program
- Trading: matching-engine

Updated TARGET.md with new URL entries.

docs/resources/referral-program.md

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+> ## Documentation Index
+> Fetch the complete documentation index at: https://docs.polymarket.com/llms.txt
+> Use this file to discover all available pages before exploring further.
+
+# Referral Program
+
+> Earn rewards by referring users to Polymarket
+
+We're excited to announce Polymarket's referral program. Existing users who have traded at least \$10,000 in volume are eligible to sign up. Get paid to refer users to Polymarket, and be eligible for future Polymarket rewards.
+
+## Referral Link
+
+You can create a referral link at [polymarket.com/refer](http://polymarket.com/refer). When someone signs up using your link, you'll earn a percentage of the fees generated from their trades. Instead of manually creating referral links, you can also find a unique referral link on each market page when signed in to your Polymarket account.
+
+The referral rewards are unlimited. The more that users you refer trade, the more you'll earn — also increasing your allocation in all future rewards.
+
+## Boosted Rebate Period
+
+For a limited time, you'll earn:
+
+* 30% of fees generated from direct referrals
+* 10% of fees generated from indirect referrals
+
+Direct referrals are those you personally refer, and indirect referrals are those referred by someone you've referred (i.e. if you refer Alice and Alice refers Bob, you'll earn 10% of trading fees generated from Bob's trading volume as well).
+
+These rewards will be for the first 180 days after a user has signed up to Polymarket, and this period is subject to change without notice.
+
+## Notes
+
+* You will earn referral rewards based on the gross trading fee that a user pays on polymarkets.
+* Not all polymarkets have fees, so you won't make \$ from volume on every polymarket.
+* Rewards are paid out once a day at midnight UTC.
+* Rewards are unlimited. You will earn more money the more the users you refer trade on the platform.
+* Polymarket reserves the right, in its sole discretion, to disqualify referrals that violate our Terms of Service — including but not limited to self-referrals or inauthentic trading.
+
+
+Built with [Mintlify](https://mintlify.com).