fix(backend): Remove Meilisearch index when notes are deleted (#10988)

* fix(backend): Include feature to delete Meilisearch index notes

* Update variable name
`cascadingNotesFilter` -> `federatedLocalCascadingNotes`

* tweak

---------

Co-authored-by: syuilo <Syuilotan@yahoo.co.jp>

packages/backend/src/core/SearchService.ts

@@ -115,6 +115,15 @@ export class SearchService {
 		}
 	}
 
+	@bindThis
+	public async unindexNote(note: Note): Promise<void> {
+		if (!['home', 'public'].includes(note.visibility)) return;
+
+		if (this.meilisearch) {
+			this.meilisearchNoteIndex!.deleteDocument(note.id);
+		}
+	}
+
 	@bindThis
 	public async searchNote(q: string, me: User | null, opts: {
 		userId?: Note['userId'] | null;