fix(telemetry): lowercase osFamily to match server enum

android/app/src/main/java/com/chronomind/app/telemetry/TelemetryService.kt

@@ -113,7 +113,7 @@ class TelemetryService @Inject constructor(
             sessionId = sessionId,
             platform = "android",
             channel = "native",
-            osFamily = "Android",
+            osFamily = "android",
             osVersion = "Android ${Build.VERSION.RELEASE} (API ${Build.VERSION.SDK_INT})",
             appVersion = "0.1.0",
             buildNumber = "1",

ios/ChronoMind/Shared/Cloud/TelemetryService.swift

@@ -88,7 +88,7 @@ final class CMTelemetryService {
             sessionId: sessionId,
             platform: platform,
             channel: channel,
-            osFamily: "iOS",
+            osFamily: "ios",
             osVersion: ProcessInfo.processInfo.operatingSystemVersionString,
             appVersion: Bundle.main.infoDictionary?["CFBundleShortVersionString"] as? String ?? "0.1.0",
             buildNumber: Bundle.main.infoDictionary?["CFBundleVersion"] as? String ?? "1",