v4.2.0
Lockstep version bump 4.1.0 -> 4.2.0 across all four crates; dvb-common dep requirement -> 4.2. Ships the #42/#43 ModuleReassembler fixes already on main (slot-count cap + zero-size rejection; O(1) stale-version lookup). - dvb-si CHANGELOG Unreleased -> 4.2.0 - dvb-common/dvb-t2mi/dvb-bbframe: lockstep notes (no own changes) - docs/release-notes/v4.2.0.md