NodeRpc

NodeRpc: the receive-side RPC dispatcher + caller-side reply logic (P1 L4).

The pure orchestration that sits between the net-kernel transport and a node's enrolled targets. The responder decodes nothing here (it works on an already- decoded CallRequest): it looks the target up by identity, runs the CAS admission check (RemoteCall.verify), invokes the local marshalling stub, and builds the CallReply to frame back. The caller side interprets a reply and makes the failure-isolation decisions (deadline expiry, peer-down).

The target table is injected here. In the full system the compiler-emitted enroll/stub mechanism (a function-by-identity registry + marshalling stubs) populates it; modelling it as an injected Targets keeps this layer pure and unit-testable and pins down exactly what that mechanism must provide: per target, its (sig_hash, impl_hash) and an invoke : args-bytes -> result-bytes stub (Err models a crash/exit inside the target body).