Add Search API data source implementation

This patch contains the code based on the feature request for version 7 ✨ Add Search API data source implementation Needs work .

The patch also contains the following patches:
"drupal/elasticsearch_connector": {
"3522107: Connect to Elastic Cloud": " https://www.drupal.org/files/issues/2025-07-13/elasticserach_connector-e... → ",
"3470901: Full Date data type": " https://www.drupal.org/files/issues/2025-07-13/elasticsearch_connector-f... → ",
"3535733: Range Filters patch": " https://www.drupal.org/files/issues/2025-07-13/elasticsearch_connector-r... → "
}

Patch 3 removes the reference to the non-existent event subscriber.

Fixing patch.

Awesome, thanks! I'll take a look at the in more detail tomorrow!

Hmm... it seems like the patch doesn't apply cleanly to 8.0.x; a brief look suggests the patch tries to re-apply the fix for the phpstan deprecation warning I fixed yesterday, so I removed that part of the patch file and the rest applied cleanly.

I committed your code to a merge request to make it easier for me to review.

I ran phpcbf to fix some of the coding standards issues automatically; but there are a few lints remaining that it cannot fix automatically.

I also noticed that the patch in #4 includes the patches from 🐛 Range Searches Active and 🐛 Upgrade path for full_date data type Active : merging those changes prematurely will cause issues in those branches, and may miss improvements made to the code in those issues; so I'm going to reverse those patches in the merge request (if you have applied any other patches, that would be helpful to know)!

@mparker17 I'm in the process of creating a patch for the 8.0.x branch.

Okay! I'll hold off on making any more changes to the merge request until you're done! Thanks again!

A new patch based off of the 8.0.x-dev branch.

The patch also contains the following patches:

• 3522107: Connect to Elastic Cloud →
• 3470901: Full Date data type →
• 3535733: Range Filters patch →

Install:

• composer require drupal/elasticsearch_connector:8.0.x-dev
• Add patch:
  "drupal/elasticsearch_connector": {
  "3549361: ElasticSearch document source": " https://www.drupal.org/files/issues/2025-08-09/elasticsearch_connector-s... → "
  }

Recommended modules:

• When using ElasticCloud, you will need the Key module.
• When using Facets Exposed Filters, you will need the Better Exposed Filters module.

Usage:

1. Add a key for your ElasticCloud account under Configuration -> System -> Keys
2. Create a server to the ElasticCloud Endpoint using the key.
3. Add an index:
   1. Use the Elasticsearch Document for indexes created on Elastic Cloud or other created indexes.
   2. There is a "Real ElasticCloud Index ID" field where you can enter in the proper id for the search index. If not set, it will use the index id from Drupal.
   3. Add the "_id" field to the index as it is required.
4. Add a view using the created index.
   1. In the View, under the Advanced Settings and Query settings, select the "Skip access checking".