73ae8ec5c5
A driver-only node has a null dbFactory but a wired applier; the old combined guard routed it to the raw-sink fallback that wipes the address space and never re-materialises. Split the guard so in-hand artifact bytes drive the real diff-and-apply; a missing artifact abandons the rebuild (keep last-known-good, #485) instead of wiping. Claude-Session: https://claude.ai/code/session_01GASWkNEi68FSCtvr6rLoEW