feat(persona): a face says which name is its own; old values kept for a pin, and removing them

[stormer78]

Uses @openvtc/trust-tasks 0.19.14 (trustoverip/dtgwg-trust-tasks-tf#538). The agent side is OpenVTC/verifiable-trust-infrastructure#1605 (slots) and #1606 (kept versions, purge-version). Merge after those land and are released: an agent without #1606 doesn't route purge-version.

Face editor — "Calls itself"

• Pick which of the attributes a face shows is the face's own name; this sets the entry's displayName slot.
• Only attributes the face shows are offered.
• A name typed only into the face is kept unless the holder picks a different one.
• composeEntriesWithSlots carries every slot through an edit. profile/put replaces the whole face, and rebuilding live entries as bare {ref} would have dropped the name on the first save.
• The NAME hint no longer says contexts see the face's name. Since VTI #1597, a context sees only the label the holder picks when a persona wears the face.

Attribute strip — kept values

• When the agent keeps an earlier value because a face is pinned to it, the strip says so and names the faces.
• Remove the old value for good calls persona/attribute/purge-version, after a confirmation that says:
  • the pinned faces will show nothing for it, not the current value;
  • anyone already shown the old value keeps it.
• The model is manager/kept-versions.ts.

Wiring

• personaAttributePurgeVersion in core admin.
• The URI is added to both CI holder-only guards (the console carries it; no wallet surface does), and the count in the guard's message is updated.
• task-surface.json resynced from vta-sdk 0.45.1.
• Recorded coverage moves 205 → 206, with the reason noted beside it.
• @openvtc/trust-tasks ^0.19.14 at the root and in core. The lockfile changes that one package only.

Checks

• npm run lint
• npm test: 1547 passed, 0 failed. New:
  • slot composition tests
  • manager-kept-versions.test.mts
  • a rendered test that the kept-value note appears and that purge asks before calling
  • a core purge-version client test
• npm run build, plus both persona guards run locally against dist/.