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_sponsorships/ae_sponsorships__sponsorship.editable_fields.ts

@@ -0,0 +1,43 @@
+export const editable_fields__sponsorship_cfg = [
+    'for_type',
+    'for_id',
+    'level_li_json',
+    'option_li_json',
+    'schedule_li_json',
+    'cfg_json',
+    'enable',
+    'hide',
+    'priority',
+    'sort',
+    'group',
+    'notes'
+];
+
+export const editable_fields__sponsorship = [
+    'poc_person_id',
+    'poc_json',
+    'name',
+    'name_override',
+    'description',
+    'email',
+    'website_url',
+    'logo_li_json',
+    'media_li_json',
+    'social_li_json',
+    'address_li_json',
+    'contact_li_json',
+    'guest_li_json',
+    'level_num',
+    'level_str',
+    'amount',
+    'questions_li_json',
+    'agree',
+    'comments',
+    'staff_notes',
+    'enable',
+    'hide',
+    'priority',
+    'sort',
+    'group',
+    'notes'
+];