proclamation-categories: sub-category management inline in parent form

- Registry: Remove 'parent.name' from listFields (all shown records
  are top-level with no parent), remove 'parent: true' from include
  since unused
- +page.server.ts: Custom load filters to parentId=null (top-level
  only); custom upsert syncs children (create/update/delete) and
  handles P2002 duplicate-name errors; custom delete cascades to
  children first to avoid FK constraint violations
- CategoryForm.svelte: Replace parentId select dropdown with dynamic
  list of sub-category inputs. Each row has a name field and Remove
  button. Pre-populates from record.children when editing existing
  categories. Add Sub-category button appends new rows
- +page.svelte: Remove unused relationOptionsData prop from
  CategoryForm; rename submit button label from 'Update' to 'Save'
- prisma: Add ProclamationCategorySubscriptionLevel join table
  migration and regenerate client
- General: Update TipTap mock, Toast, license-keys page, proclamations
  server/route tests, README, AGENTS.md, and other admin forms

src/routes/(protected)/(user)/proclamations/page.server.spec.ts

@@ -111,7 +111,11 @@ describe('(protected)/admin/proclamations page server load', () => {
 
 		expect(proclamationFindMany).toHaveBeenCalledWith(
 			expect.objectContaining({
-				include: { solfeggioFrequency: true, category: { include: { parent: true } }, subscriptionLevel: true }
+				include: {
+					solfeggioFrequency: true,
+					category: { include: { parent: true } },
+					subscriptionLevel: true
+				}
 			})
 		);
 	});