Update Polymarket documentation - March 30, 2026

Updated 229 documentation pages reflecting latest official docs changes:
- API Reference: authentication, rate-limits, clients-sdks, market-data endpoints
- Developers: CLOB, Gamma Markets, RTDS, Sports Websocket, Builders, CTF
- Trading: fees, bridge, orders, orderbook, clients
- Polymarket Learn: get-started guides, deposits, trading
- Builders: tiers, api-keys, profile, examples, order-attribution
- Quickstart: overview, first-order, websocket guides
- Concepts: markets-events, prices-orderbook, resolution
- Market Makers: getting-started, trading, liquidity-rewards
- Resources: error-codes, contract-addresses, blockchain-data

docs/api-reference/core/get-user-activity.md

@@ -8,7 +8,7 @@
 
 ## OpenAPI
 
-````yaml api-spec/data-openapi.yaml get /activity
+````yaml /api-spec/data-openapi.yaml get /activity
 openapi: 3.0.3
 info:
   title: Polymarket Data API
@@ -89,6 +89,7 @@ paths:
                 - REWARD
                 - CONVERSION
                 - MAKER_REBATE
+                - REFERRAL_REWARD
         - in: query
           name: start
           schema:
@@ -182,6 +183,7 @@ components:
             - REWARD
             - CONVERSION
             - MAKER_REBATE
+            - REFERRAL_REWARD
         size:
           type: number
         usdcSize:
@@ -228,3 +230,5 @@ components:
         - error
 
 ````
+
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