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>

src/config.h

@@ -6,7 +6,7 @@ namespace Config {
     // CLAUDE.md-Workflow "Standard-Workflow: Push & Release") - erscheint
     // im Info-Screen (Menue > System > Info) und muss zum jeweiligen
     // Git-Tag passen.
-    constexpr const char* APP_VERSION = "3.6.2";
+    constexpr const char* APP_VERSION = "3.6.3";
 
     // Display-Helligkeit (Menue > System > Helligkeit), in Prozent.
     // MIN bewusst nicht 0 - ein komplett dunkles Display koennte sonst wie