Update Polymarket documentation (2026-02-19)

- Added new documentation URLs from llms.txt index
- Updated TARGET.md with 244 total documentation pages
- Scraped new pages for trading, concepts, and API reference sections
- Updated changelog and new index pages

docs/api-reference/data-api-status/data-api-health-check.md

@@ -1,52 +1 @@
-> ## 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.
-
-# Data API Health check
-
-
-
-## OpenAPI
-
-````yaml api-reference/data-api-openapi.yaml get /
-openapi: 3.0.3
-info:
-  title: Polymarket Data API
-  version: 1.0.0
-  description: >
-    HTTP API for Polymarket data. This specification documents all public
-    routes.
-servers:
-  - url: https://data-api.polymarket.com
-    description: Relative server (same host)
-security: []
-tags:
-  - name: Data API Status
-    description: Data API health check
-  - name: Core
-  - name: Builders
-  - name: Misc
-paths:
-  /:
-    get:
-      tags:
-        - Data API Status
-      summary: Data API Health check
-      operationId: getDataApiHealth
-      responses:
-        '200':
-          description: OK
-          content:
-            application/json:
-              schema:
-                $ref: '#/components/schemas/HealthResponse'
-components:
-  schemas:
-    HealthResponse:
-      type: object
-      properties:
-        data:
-          type: string
-          example: OK
-
-````
+null