Refactor admin to shared generic CRUD; restructure proclamation categories/groups and APIs

- Replace per-model admin forms with the shared generic AdminTable/AdminModal CRUD
- Add ProclamationGroup model and admin + API v2 routes (replaces subscription levels)
- Drop subscription levels and flatten proclamation categories
- Update v2 serializers and seed data accordingly

src/routes/api/v2/proclamations/server.spec.ts

@@ -38,7 +38,8 @@ const peaceProclamation = {
 	name: 'Peace & Relaxation',
 	content: '<p>The text content</p>',
 	categoryId: 5,
-	subscriptionLevelId: 1,
+	groupId: 1,
+
 	solfeggioFrequencyId: 5,
 	solfeggioFrequency: { id: 5, name: 'Solar Plexus', value: 528 }
 };
@@ -48,7 +49,7 @@ const crown936 = {
 	name: 'Crown 936',
 	content: '<p>no canonical id</p>',
 	categoryId: 4,
-	subscriptionLevelId: 1,
+
 	solfeggioFrequencyId: 1,
 	solfeggioFrequency: { id: 1, name: 'Crown', value: 936 }
 };
@@ -88,8 +89,8 @@ describe('GET /api/v2/proclamations', () => {
 				name: peaceProclamation.name,
 				content: peaceProclamation.content,
 				categoryId: 5,
+				groupId: 1,
 				solfeggioFrequencyId: 5,
-				subscriptionLevelId: 1,
 				colorPalette: palettes[0].colors
 			}
 		]);