M3 step 4: the LoRa Scanner App, Sniffer and Captures

The Sniffer lists packets newest first (time, RSSI, SNR, and for
Meshtastic the sender, receiver and hops), with the clear header and a
hex dump on Enter (Q96); `p` picks an EU868 preset, kept in Settings
(Q95). `c` starts a Capture: pcap with LoRaTap in /captures/lora, its own
Clean-up category, recorded by a small Service so it carries on with the
App closed (Q97, Q100). The Status Bar shows L while listening, bright on
each packet, and CAP while capturing (Q101). StorageService gains raw
appends for binary files. Debug Builds get `lora inject` to test all of
this with no transmitter in range: a Capture made on the device reads
back in TShark field for field.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EhqxQ49eCju4CzKYNjZzwT

lib/storage_model/src/cleanup_plan.h

@@ -20,6 +20,7 @@ inline const CleanupCategory kCleanupCategories[] = {
     {"IRC logs", "/irc"},
     {"Wi-Fi scan logs", "/wifi/scans"},
     {"Wi-Fi captures", "/captures/wifi"},
+    {"LoRa captures", "/captures/lora"},
     {"GNSS tracks", "/gnss/tracks"},
 };