Removing DocumentLanguage, as both System Context and User Context are to be defined on DocumentVersion level.

Finetuning of embedding workers.

eveai_app/templates/document/documents.html

@@ -13,7 +13,7 @@
         {{ render_selectable_table(headers=["Document ID", "Name", "Valid From", "Valid To"], rows=rows, selectable=True, id="documentsTable") }}
         <div class="form-group mt-3">
             <button type="submit" name="action" value="edit_document" class="btn btn-primary">Edit Document</button>
-            <button type="submit" name="action" value="document_languages" class="btn btn-secondary">Show Document Languages</button>
+            <button type="submit" name="action" value="document_versions" class="btn btn-secondary">Show Document Versions</button>
         </div>
     </form>
 </div>