serve() now replies with Response::Error on a malformed JSON frame and
keeps the connection serving instead of dropping it on the parse error;
the per-connection loop only breaks on a clean disconnect
(UnexpectedEof). node.lock().unwrap() is replaced with poison-safe
into_inner() so one panicking handler can't take down the daemon.
Drop duplicate tines-core/tines-store/serde/serde_json from
dev-dependencies (only heapless is genuinely test-only).
kyle
4f61bbde00