SITE-4589: Add Elasticsearch for WordPress Beta release note

src/source/content/partials/elasticsarch-pre-ga.md

@@ -2,6 +2,4 @@
 
 This documentation describes support for Elasticsearch that is under active development and is available to customers who are participating in our **Beta** program.
 
-To request an invite, [submit this form](https://forms.gle/q5qWS17L9VsH2fkg6).
-
 </Alert>

src/source/releasenotes/2026-03-25-elasticsearch-wordpress-beta.md

@@ -0,0 +1,43 @@
+---
+title: Elasticsearch for WordPress now available in Beta
+published_date: "2026-03-25"
+categories: [new-feature, wordpress]
+---
+
+Elasticsearch is now available as a Beta add-on for WordPress sites on Pantheon. This integration is powered by [ElasticPress](https://elasticpress.io), the leading Elasticsearch solution for WordPress.
+
+## What's included?
+
+ElasticPress offloads search queries from your database to Elasticsearch, improving WP_Query performance and reducing load on your application server. Capabilities include:
+
+* **Full-text search** — Fuzzy matching, synonyms, and weighted fields for more relevant search results.
+* **Instant Search** — Real-time search-as-you-type results without full page reloads.
+* **WP_Query integration** — Elasticsearch can handle WP_Query requests, reducing database load and improving page load times.
+* **Faceted filtering** — Narrow results by category, tag, custom taxonomy, and other attributes.
+* **WooCommerce support** — Product search and filtering for WooCommerce storefronts.
+* **Related content** — Surface related posts and pages automatically.
+* **Custom content indexing** — Index posts, pages, custom post types, and custom fields.
+
+## Who has access?
+
+Elasticsearch is available to WordPress sites on **Performance Small** plans and above, including Elite.
+
+## How to enable it
+
+Elasticsearch can be enabled in two ways:
+
+* **From the dashboard** — Navigate to **Site Settings → Add-Ons** and activate Elasticsearch. Connection credentials are configured automatically.
+
+* **From Terminus** — Use the `search` command:
+
+  ```bash
+  terminus search:enable <site>.<env>
+  ```
+
+[Terminus 4.1.6](https://docs.pantheon.io/release-notes/2026/03/terminus-4-1-6) is required.
+
+Once enabled, install and activate the [ElasticPress](https://wordpress.org/plugins/elasticpress/) plugin in your WordPress admin and run your initial content sync. No manual credential configuration is required — `EP_HOST`, `EP_INDEX_PREFIX`, and `EP_CREDENTIALS` are set automatically across all environments.
+
+## Documentation
+
+For setup instructions and additional guidance, see [Elasticsearch on Pantheon](/guides/pantheon-search/elasticsearch).