Merge IoTThinks PowerSaving-v17 into keymindCascade

Integrate PowerSaving-v17 through a27e78e4 (six new commits).
Use its 10-minute awake / 30-minute asleep companion GPS profile and
separate requested GPS state from receiver power in CLI diagnostics.
Include its nRF52 sensor debug-console settle delay and debug option.

Resolve overlapping GPS v2 changes using the current sensor callbacks,
which already implement live power-saving transitions, user-off control,
telemetry acquisition, wrap-safe sleep/wake timers and retained Airoha
RTC backup. Preserve preference persistence, telemetry cache/holds and
UART/shared-rail ownership safeguards across all four GPS drivers.

Add a compiled production GPS status regression test and run it in CI.
Validated 23 native GPS/power tests, preference and nRF52 pin contracts,
and firmware builds for T1000-E BLE Companion, MeshTracker X1 USB
Companion, Heltec Tracker Repeater, Mesh Solar Room and RAK4631 Sensor.

variants/t1000-e/platformio.ini

@@ -144,6 +144,7 @@ build_flags = ${t1000-e.build_flags}
   -D MAX_NEIGHBOURS=50
 ;  -D MESH_PACKET_LOGGING=1
 ;  -D MESH_DEBUG=1
+;  -D POWERSAVING_DEBUG=1
 build_src_filter = ${t1000-e.build_src_filter}
   +<../examples/simple_sensor>
 lib_deps = ${t1000-e.lib_deps}