Replaced the anonymous JSON shapes of the Assistant Builder and the SWOT moderation with records

app/Tests/Serialization/Fixtures/assistant-builder-generation-data.json

@@ -0,0 +1,4 @@
+{
+  "approved_assistant_draft": "# Assistant Draft\n## Name\nMeeting \u0022Notes\u0022 Summary\n## Description\nSummarizes \u003Cnotes\u003E of any Gr\u00F6\u00DFe.",
+  "review_notes": null
+}