Add two-profile LoRa operation and radio CLI regression coverage

Implement radio2, tempradio2, radioat2 and tempradioat2 across Mesh roles,
with RX-only/RX+TX operation, optional preambles and persistent cross-TX
policy. Keep temporary OTA traffic on its profile by default and maintain
independent retry ownership and backoff for each profile.

Use slow-first receive scanning with 4.8-symbol visits and automatic
preambles rounded up in steps of eight. Preserve pending RX, restore power
saving on exit, and discard work bound to changed or expired profiles.

Restore the infrastructure path.hash.mode setter and report unsupported
extra.sf settings consistently. Add CLI, scheduling, scan and retry tests,
setup documentation, and the V4/XIAO hardware validation results.

Validation: 1,422 native tests, eight KISS tests, 63 final focused profile
tests, 18 checks from the staged source, sanitizer-enabled OTA transfers,
and builds for V4 Mesh roles, Full XIAO Companion and nRF52 T1000-E.
Hardware checks cover reception, cross-TX policy, expiry, reboot and OTA
discovery while receiving main-channel adverts.

test/test_local_cli_access.py

@@ -14,6 +14,7 @@ PREAMBLE = r'''
 #include <cstdint>
 #include <initializer_list>
 #include <helpers/CLICommandUtils.h>
+#include <helpers/RadioProfileCommandUtils.h>
 #define ESP32 1
 #define WIFI_SSID "test"
 #define WITH_MQTT_BRIDGE 1
@@ -22,6 +23,16 @@ PREAMBLE = r'''
 #define MAX_LORA_TX_POWER 22
 #define TXT_TYPE_CLI_COMMAND 1
 namespace mesh {
+struct RadioProfileCLI {
+  bool handle(const char*, char*, size_t) { return false; }
+  static bool parseSuffix(const char* input, unsigned fields, char* legacy, size_t size, uint16_t& preamble) {
+    return cli::parseRadioPreambleSuffix(input, fields, legacy, size, preamble);
+  }
+  bool acceptsPrimary(float, float, uint8_t, uint8_t, uint16_t) { return true; }
+  bool savePrimaryPreamble(uint16_t) { return true; }
+  uint16_t primaryPreamble() const { return 0; }
+  void appendSavedPreamble(char*, size_t, uint8_t, float) {}
+};
 struct Packet {};
 void resetLazyPersistenceAfterSuccess(unsigned& when, uint8_t& failures) { when=0; failures=0; }
 struct Utils {
@@ -77,6 +88,7 @@ struct WebConfigServer {
 const char* FIRMWARE_VERSION="test";
 const char* FIRMWARE_BUILD_DATE="test";
 struct MyMesh {
+  mesh::RadioProfileCLI _radio_profiles;
   Identity self_id;
   Store store; Store* _store=&store;
   Prefs _prefs;