Why: backend #83 merged the slow-lane wiring (intentsem scorer/
generator, gate SetSemantic/SetGenerator, settings flags default off);
the Dev pins and boundary rules must move with it.
Evidence: backend CI green on 9d29371; check-pins consistent
(agent-intent 343b1e6 across Dev and the backend nested copy);
lint-boundaries registers intentsem as an agent-intent adapter and the
architecture baseline gains backend/app->backend/intentsem.
Impact: product behavior unchanged by default; the two
runtime.intent* flags opt into the slow lane.
Refs: Agent-System-Backend#83, I2 increment 3