Java REQ socket crashes after a receive timeout #576

The Java ZMQ REQ path does not recover after a receive timeout.

Repro:

1. Connect a Java REQ socket to a REP peer.
2. Let the peer receive one request without replying.
3. readZmqPort() returns TIMEOUT.
4. Send another request on the same port.

The second write crashes with:

org.zeromq.ZMQException:
Operation cannot be accomplished in current state

The REQ socket is still waiting for the previous reply, but the runtime reuses it. It should reset/recreate the socket or use REQ_RELAXED, and report a controlled failure instead of killing the Java node

Tested on dev at 4397b6f, JDK 22.0.2, JeroMQ 0.6.0