fix: apply access filter to samples findOne - #2885

Please address the comments from this code review:

## Overall Comments
- Consider extracting the `queryFilters` parsing and `updateFiltersForList` application into a shared helper so the list and findOne endpoints stay consistently aligned when filter/access logic changes.

## Individual Comments

### Comment 1
<location path="src/samples/samples.controller.ts" line_range="604-607" />
<code_context>
-    const jsonFilters: IFilters<SampleDocument, ISampleFields> = queryFilters
-      ? JSON.parse(queryFilters)
-      : {};
+    const jsonFilters: IFilters<SampleDocument, ISampleFields> =
+      this.updateFiltersForList(
+        request,
+        queryFilters ? JSON.parse(queryFilters) : {},
+      );
     const whereFilters = jsonFilters.where ?? {};
</code_context>
<issue_to_address>
**issue:** Consider handling malformed JSON in `queryFilters` to avoid unexpected runtime errors.

Because `queryFilters` comes from user input, any invalid JSON passed to `JSON.parse` will throw and can surface as a 500. Consider wrapping the parse in try/catch (or similar defensive parsing) so you can return a controlled client error (e.g., 400) instead of an uncaught exception.
</issue_to_address>