user d58b6dd814 feat: v1.9 — multi-channel scanning, BLE fingerprinting ...

Multi-channel scanning (CHANSCAN command):
- Periodic channel hopping (1-13) with 100ms dwell for broader probe capture
- CHANSCAN ON/OFF/NOW/INTERVAL subcommands
- New NVS keys: chanscan (i8), chanscan_int (i32)
- Emits EVENT,hostname,chanscan=done channels=13 on completion
- PROBE_DATA now includes channel number

BLE fingerprinting:
- Extended BLE_DATA format with company_id, tx_power, flags
- Extracts manufacturer data from BLE advertisements
- Common IDs: 0x004C (Apple), 0x00E0 (Google), 0x0075 (Samsung)

STATUS output now includes chanscan=on/off field.

2026-02-05 17:38:08 +01:00

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