Remove inject-only bypass in _peer_should_receive_dmrd so peers with
empty OPTIONS (silent witness) never receive group DMRD. Align
peer_listen_slots for simplex with static TG lists.
Normalize all Python sources to the standard ADN copyright block with
complete GPLv3 notice. Add legacy attribution on routing and dmr_utils
ports; drop SemVer wording from changelog and fix an unused test import.
Add real-stack REPEAT and proxy fan-in E2E tests so regressions outside
DeterministicScenario are caught. Remove duplicate or fragile tests,
consolidate monitor remap cases, and document harness vs integration policy.
ce5rpy
Rodrigo Pérez