Release v3.6.3: OTA reliability + watchdog fix + WebUI live radar

Fixes a watchdog reset that could crash the device after many hours
of continuous flight logging: yield() alone doesn't reliably feed the
task watchdog (it only yields to the idle task when another
equal-or-higher-priority task is actually ready to run), so long CSV
scans in flight_logbook.cpp now use delay(1) instead, in
countLinesFast(), loadSeenFromCurrentFile(), and todayMaxAltitude().

Bundles all OTA reliability and WebUI live radar work already
committed since v3.6.0 (title-overflow fix, OTA diagnostic logging,
NetTask pause/resume during updates, WebUI radar compass/click/
radius/starfield enhancements).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

index.html

@@ -112,7 +112,7 @@
 <div class="container">
     <h1>EISWOLFS FLIGHTRADAR CYD</h1>
     <div class="subtitle">Firmware Flash Utility</div>
-    <div class="version-badge">Version: v3.6.2</div>
+    <div class="version-badge">Version: v3.6.3</div>
 
     <p>Install the latest Flightradar firmware directly from your browser to your Cheap Yellow Display.</p>