update changelog, readme

Author: jonhealy1

CHANGELOG.md

@@ -12,7 +12,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - Added logging to bulk insertion methods to provide detailed feedback on errors encountered during operations. [#364](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/364)
 - Introduced the `RAISE_ON_BULK_ERROR` environment variable to control whether bulk insertion methods raise exceptions on errors (`true`) or log warnings and continue processing (`false`). [#364](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/364)
 - Added code coverage reporting to the test suite using pytest-cov. [#87](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/issues/87)
-- Introduced the `DATABASE_REFRESH` environment variable to control whether database operations refresh the index immediately after changes. If set to `true`, changes will be immediately searchable. If set to `false`, changes may not be immediately visible but can improve performance for bulk operations. [#370](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/370)
+- Introduced the `DATABASE_REFRESH` environment variable to control whether database operations refresh the index immediately after changes. If set to `true`, changes will be immediately searchable. If set to `false`, changes may not be immediately visible but can improve performance for bulk operations. If set to `wait_for`, changes will wait for the next refresh cycle to become visible. [#370](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/370)
 
 ### Changed
 

README.md

@@ -115,7 +115,7 @@ You can customize additional settings in your `.env` file:
 | `OPENSEARCH_VERSION`         | OpenSearch version                                                                   | `2.11.1`                 | Optional       
 | `ENABLE_DIRECT_RESPONSE`         | Enable direct response for maximum performance (disables all FastAPI dependencies, including authentication, custom status codes, and validation) | `false`                  | Optional       
 | `RAISE_ON_BULK_ERROR`         | Controls whether bulk insert operations raise exceptions on errors. If set to `true`, the operation will stop and raise an exception when an error occurs. If set to `false`, errors will be logged, and the operation will continue. **Note:** STAC Item and ItemCollection validation errors will always raise, regardless of this flag. | `false`             Optional                                                                                |
-| `DATABASE_REFRESH`              | Controls whether database operations refresh the index immediately after changes. If set to `true`, changes will be immediately searchable. If set to `false`, changes may not be immediately visible but can improve performance for bulk operations. | `false`                  | Optional |
+| `DATABASE_REFRESH`              | Controls whether database operations refresh the index immediately after changes. If set to `true`, changes will be immediately searchable. If set to `false`, changes may not be immediately visible but can improve performance for bulk operations. If set to `wait_for`, changes will wait for the next refresh cycle to become visible. | `false`                  | Optional |
 
 > [!NOTE]
 > The variables `ES_HOST`, `ES_PORT`, `ES_USE_SSL`, and `ES_VERIFY_CERTS` apply to both Elasticsearch and OpenSearch backends, so there is no need to rename the key names to `OS_` even if you're using OpenSearch.