test(metadata-protocol): the lock family's enumeration pin covers the artifact layer's package axis

The generated pin becomes the family's enumeration: named positions (layer x
topology / organization / package), slices that open them, and a completeness
check that fails by name. PR #21801's 16 320 rows are kept, checked under
their own titles. Every row also asserts the served body states the envelope's
lock. Named pins: the card's case, the never-widening join, a disabled
package, and the folded content-scope position.

Claude-Session: https://claude.ai/code/session_017ErfyP2Rx7XWHJA27QjyUi
Co-authored-by: Claude <noreply@anthropic.com>

Author: claude