Add Note service for note.* v3 support (#515)

[fatestr1ngs]

Q	A
Bug fix?	no
New feature?	yes
Deprecations?	no
Issues	Fix #515
License	MIT

Adds the note.* v3 scope (Knowledge Base 2.0) — all 25 methods across three services:

• Collection (note.collection.*, 8 methods): add, archive, delete, fieldGet, fieldList, get, list, update. list() uses cursor-based pagination via typed CollectionListPagination / CollectionListCursor value objects (modeled on the existing Main\Service\EventLogTailCursor idiom), since the server returns a ready-made nextCursor object.
• Document (note.document.*, 13 methods): CRUD + archive, plus note.document.tree.* and note.document.search.* folded into the same service class.
• File (note.file.*, 4 methods): upload (base64-encoded content) and retrieval.

$note = $serviceBuilder->getNoteScope();

$collection = $note->collection()->add('Product docs')->collection();
$document = $note->document()->add($collection->id, 'Getting started', markdown: '# Hello')->document();
$note->file()->add($document->id, 'diagram.png', base64_encode($binaryContent));

$cursor = null;
do {
    $page = $note->collection()->list(new CollectionListPagination(50, $cursor));
    // ...
    $cursor = $page->getNextCursor();
} while ($cursor !== null);

Note: while implementing, live verification against a real portal showed that every *.field.list response wraps its array in result.items (matching every other list endpoint), even though the OpenAPI schema describes result itself as a flat array. All five *FieldsResult classes were fixed and covered by integration tests that assert non-empty field lists.

Test plan

• make lint-cs-fixer — passed
• make lint-deptrac — passed (0 violations)
• make test-unit — passed (1013/1013, no regressions)
• make test-integration-note-collection — passed (11/11, live portal)
• make test-integration-note-document — passed (21/21, live portal)
• make test-integration-note-file — passed (6/6, live portal)
• make lint-phpstan / make lint-rector — passed

Closes #515