minor #485 [Store] Add documentation to InMemoryLoader class (OskarStark)

This PR was merged into the main branch.

Discussion
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[Store] Add documentation to `InMemoryLoader` class

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| Docs?         | no
| Issues        | --
| License       | MIT

Commits
-------

4a40496 [Store] Add documentation to InMemoryLoader class

Author: OskarStark

src/store/src/Document/Loader/InMemoryLoader.php

@@ -15,12 +15,15 @@
 use Symfony\AI\Store\Document\TextDocument;
 
 /**
+ * Loader that returns pre-loaded TextDocuments from memory.
+ * Useful for testing or when documents are already available as objects.
+ *
  * @author Oskar Stark <[email protected]>
  */
 final readonly class InMemoryLoader implements LoaderInterface
 {
     /**
-     * @param array<TextDocument> $documents
+     * @param TextDocument[] $documents
      */
     public function __construct(
         private array $documents = [],