Merge meshcore-dev dev with routing, WiFi and power-policy compatibility

Integrate upstream 1.18.0, delayed direct ACK forwarding, zero-scope routing, Waveshare LR1121 and dynamic WiFi variants. Preserve fork chemistry-aware power management and bounded multi-interface UI; retain retry/dedup safety while adding upstream ACK delay. Qualify LR1121 band power and HP-only Morse handling with native regressions.

.github/workflows/run-unit-tests.yml

@@ -197,6 +197,9 @@ jobs:
           python3 -B test/test_room_web_service.py -v
           python3 -B test/test_contact_clock_bootstrap.py -v
           python3 -B test/test_rtc_discovery.py -v
+          python3 -B test/test_upstream_routing_merge.py -v
+          python3 -B test/test_upstream_power_policy_merge.py -v
+          python3 -B test/test_lr1121_power_merge.py -v
           python3 -B test/test_radio_interrupt_recovery.py -v
           python3 -B test/test_bridge_recovery.py -v