Add per-profile TX routing and bridge filtering

Persist Companion TX preferences per contact and channel. Default repeater,
room, and sensor replies to both active TX profiles, with a reply-only force
option for an RX-only secondary profile. Track both reply copies before a
temporary-radio handoff and account for OTA copies under queue backpressure.

Add bridge/crossover filter modes and the third built-in wardriving filter,
plus compact filter CLI syntax, documentation, and CI coverage.

Fix quoted target names being interpreted as slot/key selectors, partial
recovery of invalid saved reply settings, filter suspension during tempradio2,
and unnecessary packet allocation while OTA traffic is throttled.

Validation: 1,477 native tests, 52 Python integration tests, 29 filter UI tests,
and five firmware builds covering ESP32, nRF52, and STM32 passed.

src/Packet.cpp

@@ -15,6 +15,8 @@ Packet::Packet() {
   radio_generation = radio_origin_generation = 0;
   radio_profile = radio_origin = 0;
   radio_bound = false; radio_local = true;
+  tx_radio = RADIO_TX_AUTO;
+  radio_reply = radio_reply_force = false;
 }
 
 bool Packet::isValidPathLen(uint8_t path_len) {
@@ -81,6 +83,8 @@ bool Packet::readFrom(const uint8_t src[], uint8_t len) {
   radio_profile = radio_origin = 0;
   radio_bound = false; radio_local = true;
   header = src[i++];
+  tx_radio = RADIO_TX_AUTO;
+  radio_reply = radio_reply_force = false;
   if (getPayloadVer() > PAYLOAD_VER_1) return false;
 
   if (hasTransportCodes()) {