Issue: ACL denial of egress requests causes timeouts instead of immediate empty replies

Issue: ACL denial of egress requests causes timeouts instead of immediate empty replies: a task in LegoFlow-SWE (Harbor dataset). When Access Control (ACL) denies egress for request-style messages, zenoh currently leaves the caller waiting until its timeout expires, after which an error is logged…

The task

When Access Control (ACL) denies egress for request-style messages, zenoh currently leaves the caller waiting until its timeout expires, after which an error is logged. This affects both regular queries and liveliness queries.

Part of Lego-X/LegoFlow-SWE.