[@W-21368901] Fix deep allOf schema rendering (4+ levels)

[alexpmule]

Summary

Fixes W-21368901 - API Console fails to render properties from deeply nested allOf schemas (4+ levels).

What Changed

• ✅ Updated @api-components/api-example-generator to 4.4.36 (recursive property collection)
• ✅ Updated @api-components/api-type-document to 4.2.42 (recursive property collection)
• ✅ Added regression test for deep allOf (test/api-console-deep-allof.test.js)
• ✅ Added product-order-minimal to demos (element, standalone, themed)
• ✅ Added nullable spec for W-11650729 (old bug reference)

Root Cause

Single-pass iteration through allOf shapes didn't recursively expand nested shacl:and arrays beyond 3 levels.

Solution

Both updated components now use recursive property collection with:

• Depth limiting (max 10 levels)
• Circular reference detection (visited Set)
• Backward compatibility (augments existing logic, doesn't replace)

Testing

• ✅ api-example-generator: 714 tests passed (new deep-allof tests added)
• ✅ api-type-document: 547 tests passed (new deep-allof tests added)
• ✅ api-console: New regression test added (api-console-deep-allof.test.js)
• ✅ Manual verification: date and timeSlot fields now display in PXCAppointmentRef

Demo

npm start
# Navigate to http://localhost:8000/demo/element/
# Select "W-21368901 - Deep allOf"
# Navigate to Types → PXCAppointmentRef
# Verify date and timeSlot fields are displayed

Customer Impact

- Sev 1, Signature account - Critical fields missing in Product Order API documentation
- Now displays all properties from 4+ level allOf chains

Related

- W-21367647 (original investigation)
- api-example-generator: v4.4.36 (published)
- api-type-document: v4.2.42 (published)