- Skip the hub-platform GATT slot cap in testing mode (mirrors
esp32_ble.validate_connection_slots) so grouped builds validate
- Derive the neutral engine's source filter from the backend registry so
a new platform cannot validate and then fail at link
- Log the real code on refused service discovery and cancelled connects;
read completions get the same breadcrumb writes have
- Comment accuracy: the dumper arm is the legacy shape, not a superset
- Ledger tests: real-validator end-to-end path and the testing-mode skip
- Drop unused includes (ble_client_state.h, <utility>) and the unused
notify/indicate property constants (no CCCD path yet)
- Note the frozen node-facing surface on the uncalled backend forwarders
- Keep the legacy-only 'name' key out of the neutral schema
- Move the slot-ledger test to tests/component_tests/bluetooth_connection
- Comment accuracy fixes (choke-point wording, wrapped lines, backoff note)
J. Nick Koston