DESCRIBE NANOFLOW omits `excluded` property

[retran]

Description

When a nanoflow has Excluded=true (shown in SHOW NANOFLOWS), DESCRIBE output does not emit the excluded annotation or property.

Steps to Reproduce

Find a nanoflow with Excluded=true in SHOW NANOFLOWS, then DESCRIBE it.

Expected

Output includes @excluded or excluded true

Actual

No excluded marker in output

Severity

Low

Test Case Reference

nanoflow-test-cases.md §2.10