Complete editable fields whitelists for all remaining AE objects

- Created .editable_fields.ts files for Journals, Events, and Sponsorships modules
- Standardized the whitelist pattern across the entire codebase
- Updated TODO.md and GEMINI.md with recent accomplishments and learnings

src/lib/ae_journals/ae_journals__journal_entry.editable_fields.ts

@@ -0,0 +1,32 @@
+export const editable_fields__journal_entry = [
+    'code',
+    'journal_entry_type',
+    'activity_code',
+    'category_code',
+    'type_code',
+    'topic_code',
+    'tags',
+    'public',
+    'private',
+    'personal',
+    'professional',
+    'name',
+    'short_name',
+    'summary',
+    'outline',
+    'content',
+    'content_html',
+    'content_json',
+    'history',
+    'alert',
+    'alert_msg',
+    'data_json',
+    'enable',
+    'hide',
+    'archive',
+    'archive_on',
+    'priority',
+    'sort',
+    'group',
+    'notes'
+];