Bring pinative/agentx workspace registry and A-B harness onto current
local_dev; renumber goose agentx registry 00062→00066 to avoid clash
with chat-summary/provenance migrations. Keep CURRENT/MATRIX as ours
for later docs apply; union module-boundaries agentx import tree.
Path literals use workspace constants for arch-check.
Track workspace size and age, expose an admin list and cleanup route, and refuse TTL or quota deletion until a frozen manifest matches verified receipts.