docs: auto-update for v2.50.4

Author: github-actions[bot]

docs/api-reference/openapi.json

@@ -3,7 +3,7 @@
   "info": {
     "title": "PMXT Hosted API",
     "description": "One API for every prediction market. Cross-venue search in under 10ms, a single unified schema, and the complete venue surface from reads to trades.",
-    "version": "2.50.3"
+    "version": "2.50.4"
   },
   "servers": [
     {

docs/concepts/venues.mdx

@@ -7,7 +7,7 @@ description: "Every venue PMXT currently speaks."
   AUTO-GENERATED from pmxt-core's openapi spec (ExchangeParam enum).
   Do not edit by hand — run `npm run generate:mintlify` to regenerate.
   Source: docs/api-reference/openapi.json
-  pmxt-core version at last sync: 2.50.3
+  pmxt-core version at last sync: 2.50.4
 */}
 
 PMXT Hosted currently supports the following venues. The **wire key** is