refactor: fold machine-remote-data into remote-data.ts, PascalCase load lifecycle (RD-11)

`machine-remote-data.ts` defined a third encoding of an in-flight fetch:
`LoadLifecycle`. It had three call sites, all one identical line, and the type
was never imported by name. Move the mapping into `remote-data.ts` as
`fromLoadLifecycle`, beside its neighbour `fromResource` — a `RemoteData`
constructor, not a sixth encoding.

The lowercase `loading`/`failed`/`loaded` tags on `BriefState`,
`OrgTemplateState` and `StamdataEditorState` existed only because
`LoadLifecycle` required them. Now that the constraint is inline and
PascalCase, the three machines' load-lifecycle tags become `Loading`,
`Failed` and `Loaded` — matching their own PascalCase message tags in the
same file. `stamdata-editor.machine.spec.ts` no longer asserts a PascalCase
message producing a lowercase state.

`BriefStatus` (the letter's draft/submitted/approved/rejected/sent status,
parsed off the wire from `BriefViewDto`) is a separate tag family and is
untouched — its tag count stays 54 before and after this change.

Delete `machine-remote-data.ts` and merge its spec into `remote-data.spec.ts`.
Regenerate `behaviour-spec.mdx` (the `machineRemoteData` section heading
becomes `fromLoadLifecycle`) and confirm `gen:snippets` reports no drift, since
`remote-data.ts` carries a showcase region.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

apps/ssp/src/app/brief/domain/org-template.machine.spec.ts

@@ -26,7 +26,7 @@ const view = (over: Partial<OrgTemplateAdminView> = {}): OrgTemplateAdminView =>
 });
 
 const loaded = (): OrgTemplateState =>
-  reduce({ tag: 'loading' }, { tag: 'DraftLoaded', view: view() });
+  reduce({ tag: 'Loading' }, { tag: 'DraftLoaded', view: view() });
 
 const logoCategory: DocumentCategory = {
   categoryId: 'org-logo',
@@ -41,7 +41,7 @@ const logoCategory: DocumentCategory = {
 
 describe('org-template.machine', () => {
   it('DraftLoaded moves to loaded with the draft, clean', () => {
-    const s = expectTag(loaded(), 'loaded');
+    const s = expectTag(loaded(), 'Loaded');
     expect(s.draft.orgName).toBe('CIBG');
     expect(s.subOrgId).toBe('cibg-registers');
     expect(s.unsentBriefs).toBe(2);
@@ -49,14 +49,14 @@ describe('org-template.machine', () => {
   });
 
   it('LoadFailed carries the reason', () => {
-    const s = reduce({ tag: 'loading' }, { tag: 'LoadFailed', reason: 'boom' });
-    expect(s).toEqual({ tag: 'failed', reason: 'boom' });
+    const s = reduce({ tag: 'Loading' }, { tag: 'LoadFailed', reason: 'boom' });
+    expect(s).toEqual({ tag: 'Failed', reason: 'boom' });
   });
 
   it('FieldEdited edits the draft and marks dirty', () => {
     const s = expectTag(
       reduce(loaded(), { tag: 'FieldEdited', field: 'orgName', value: 'CIBG Nieuw' }),
-      'loaded',
+      'Loaded',
     );
     expect(s.draft.orgName).toBe('CIBG Nieuw');
     expect(s.dirty).toBe(true);
@@ -65,7 +65,7 @@ describe('org-template.machine', () => {
   it('MarginEdited edits one edge and marks dirty', () => {
     const s = expectTag(
       reduce(loaded(), { tag: 'MarginEdited', edge: 'topMm', value: 40 }),
-      'loaded',
+      'Loaded',
     );
     expect(s.draft.margins.topMm).toBe(40);
     expect(s.draft.margins.leftMm).toBe(20);
@@ -75,9 +75,9 @@ describe('org-template.machine', () => {
   it('DraftSaved clears dirty when the saved draft is the current one', () => {
     const edited = expectTag(
       reduce(loaded(), { tag: 'FieldEdited', field: 'orgName', value: 'X' }),
-      'loaded',
+      'Loaded',
     );
-    const s = expectTag(reduce(edited, { tag: 'DraftSaved', savedDraft: edited.draft }), 'loaded');
+    const s = expectTag(reduce(edited, { tag: 'DraftSaved', savedDraft: edited.draft }), 'Loaded');
     expect(s.dirty).toBe(false);
     expect(s.draft.orgName).toBe('X');
   });
@@ -85,20 +85,20 @@ describe('org-template.machine', () => {
   it('DraftSaved keeps dirty when an edit landed during the save round-trip', () => {
     const editing = expectTag(
       reduce(loaded(), { tag: 'FieldEdited', field: 'orgName', value: 'X' }),
-      'loaded',
+      'Loaded',
     );
     const savedDraft = editing.draft;
     // a further edit changes the draft reference before the save resolves
     const raced = reduce(editing, { tag: 'FieldEdited', field: 'orgName', value: 'Y' });
-    const s = expectTag(reduce(raced, { tag: 'DraftSaved', savedDraft }), 'loaded');
+    const s = expectTag(reduce(raced, { tag: 'DraftSaved', savedDraft }), 'Loaded');
     expect(s.dirty).toBe(true);
   });
 
   it('edits are no-ops in non-loaded states', () => {
     expect(
-      reduce({ tag: 'loading' }, { tag: 'FieldEdited', field: 'orgName', value: 'x' }),
+      reduce({ tag: 'Loading' }, { tag: 'FieldEdited', field: 'orgName', value: 'x' }),
     ).toEqual({
-      tag: 'loading',
+      tag: 'Loading',
     });
   });
 
@@ -122,7 +122,7 @@ describe('org-template.machine', () => {
         tag: 'Upload',
         msg: { type: 'UploadComplete', localId: 'a', documentId: 'doc-1' },
       }),
-      'loaded',
+      'Loaded',
     );
     expect(done.draft.logoDocumentId).toBe('doc-1');
     expect(done.dirty).toBe(true);
@@ -138,7 +138,7 @@ describe('org-template.machine', () => {
         tag: 'Upload',
         msg: { type: 'UploadRemoved', localId: 'a' },
       }),
-      'loaded',
+      'Loaded',
     );
     expect(removed.draft.logoDocumentId).toBeUndefined();
     expect(removed.dirty).toBe(true);
@@ -154,7 +154,7 @@ describe('org-template.machine', () => {
         tag: 'DraftLoaded',
         view: view({ draft: { ...template, subOrgId: 'cibg-vakbekwaamheid' } }),
       }),
-      'loaded',
+      'Loaded',
     );
     expect(switched.upload.categories).toHaveLength(1);
     expect(switched.upload.uploads).toHaveLength(0);