Merge PR #7 with reviewed ExpressLRS power and memory fixes

Integrate ExpressLRS TX module support and its stacked ESP32 heap changes.
Use the approved Linkflow calibration (17-30 dBm), preserve the PA drive
and output path after radio recovery, and keep LoRa OTA enabled.

Preserve stored ACLs and filters on allocation failure, release owned
client/filter buffers, service heap OTA contexts on Companions, release
self-serving workspaces after TempRadio, and reset staged-resume state
when a context is released. Keep manual staging and active operations
alive. Account for all moved allocations in the runtime RAM gate.

Validation: 1,393 native cases; radio-power, heap-context, ACL persistence,
shared-queue transfer, display/inbox, radio receive, and memory regressions.
Firmware builds passed for Linkflow, Heltec V2 Companion, T-Beam MQTT
repeater, Heltec V4 R8 MQTT repeater, RAK4631 repeater, and Indicator Full.
Physical verification awaits access to the currently offline lab Pi.

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

@@ -74,7 +74,11 @@ jobs:
           python3 -B test/test_sx126x_receive_mode.py
 
       - name: Verify ESP32 static DRAM budget
-        run: python3 -B test/test_esp32_dram.py
+        run: |
+          python3 -B test/test_esp32_dram.py
+          python3 -B test/test_elrs_power.py
+          python3 -B test/test_ota_heap_context.py
+          python3 -B test/test_client_acl_spiffs.py
 
       - name: Verify ESP32 USB sleep and G3 button wake
         run: python3 -B test/test_esp32_usb_sleep.py