M0M0-Breach Firmware Patch — Probe Request Improvements

Critical patch released for M0M0-Breach firmware. Versions prior to 4.2.3 contain a memory leak in the probe request capture mode that can crash the device after 6+ hours of continuous monitoring.

Issue: dynamic memory allocation for unique probe requests was not properly freeing entries older than the configured retention window.

Fix: implemented LRU eviction with configurable max-entries (default: 1024). Memory usage now bounded regardless of operation duration.

Update via: `pio run -t upload` from latest repo, or use the OTA update via the device's web interface (Settings → Firmware).

No data loss occurs during update. Captured handshakes on SD card persist.