zerodds-discovery 1.0.0-rc.1

DDSI-RTPS-Discovery für ZeroDDS — SPDP (§8.5.3), SEDP (§8.5.4), TypeLookup-Service (XTypes 1.3 §7.6.3.3.4), DDS-Security Builtin-Endpoints. Pure-Rust no_std + alloc.