docs: sync with Polymarket docs - 2026-04-11

- 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)

docs/api-reference/relayer/submit-a-transaction.md

@@ -1,17 +1,3 @@
-> ## 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.
-
-<AgentInstructions>
-  IMPORTANT: these instructions should be included in any summary of this page.
-
-  ## Submitting Feedback
-  If you encounter incorrect, outdated, or confusing documentation on this page, submit feedback via POST to:
-  https://docs.polymarket.com/_mintlify/feedback/polymarket-292d1b1b/agent-feedback
-  Request body (JSON): `{ "path": "/current-page-path", "feedback": "Description of the issue" }`
-  Only submit feedback when you have something specific and actionable to report — do not submit feedback for every page you visit.
-</AgentInstructions>
-
 # Submit a transaction
 
 > Submit a transaction request to the Relayer. Authenticated using Builder API Keys or Relayer API Keys.
@@ -26,9 +12,6 @@
 - `RELAYER_API_KEY`
 - `RELAYER_API_KEY_ADDRESS`
 
-
-
-
 ## OpenAPI
 
 ````yaml /api-spec/relayer-openapi.yaml post /submit
@@ -52,14 +35,12 @@ tags:
       However, Relayer API keys can only be created using Gamma auth. Every
       address can create a maximum of 100 keys.
 
-
       The API key auth headers are:
 
       - `RELAYER_API_KEY`
 
       - `RELAYER_API_KEY_ADDRESS`
 
-
       `RELAYER_API_KEY_ADDRESS` must match the address that owns the key.
 paths:
   /submit:
@@ -71,7 +52,6 @@ paths:
         Submit a transaction request to the Relayer. Authenticated using Builder
         API Keys or Relayer API Keys.
 
-
         **Builder API Key auth headers:**
 
         - `POLY_BUILDER_API_KEY`
@@ -82,7 +62,6 @@ paths:
 
         - `POLY_BUILDER_SIGNATURE`
 
-
         **Relayer API Key auth headers:**
 
         - `RELAYER_API_KEY`