initial swift data conversion

Meshtastic/Model/TelemetryEntity.swift

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+//
+//  TelemetryEntity.swift
+//  Meshtastic
+//
+//  SwiftData model for telemetry data.
+//  Replaces the manual Core Data TelemetryEntity+CoreDataClass/Properties files.
+//
+
+import Foundation
+import SwiftData
+
+@Model
+final class TelemetryEntity {
+	// Non-optional scalars
+	var metricsType: Int32 = 0
+	var numOnlineNodes: Int32 = 0
+	var numPacketsRx: Int32 = 0
+	var numPacketsRxBad: Int32 = 0
+	var numPacketsTx: Int32 = 0
+	var numRxDupe: Int32 = 0
+	var numTotalNodes: Int32 = 0
+	var numTxRelay: Int32 = 0
+	var numTxRelayCanceled: Int32 = 0
+	var time: Date?
+
+	// Optional scalars (previously used @ManagedAttribute wrapper)
+	var airUtilTx: Float?
+	var barometricPressure: Float?
+	var batteryLevel: Int32?
+	var channelUtilization: Float?
+	var current: Float?
+	var distance: Float?
+	var gasResistance: Float?
+	var iaq: Int32?
+	var irLux: Float?
+	var lux: Float?
+	var powerCh1Current: Float?
+	var powerCh1Voltage: Float?
+	var powerCh2Current: Float?
+	var powerCh2Voltage: Float?
+	var powerCh3Current: Float?
+	var powerCh3Voltage: Float?
+	var radiation: Float?
+	var rainfall1H: Float?
+	var rainfall24H: Float?
+	var relativeHumidity: Float?
+	var rssi: Int32?
+	var snr: Float?
+	var soilMoisture: UInt32?
+	var soilTemperature: Float?
+	var temperature: Float?
+	var uptimeSeconds: Int32?
+	var uvLux: Float?
+	var voltage: Float?
+	var weight: Float?
+	var whiteLux: Float?
+	var windDirection: Int32?
+	var windGust: Float?
+	var windLull: Float?
+	var windSpeed: Float?
+
+	// Relationship
+	var nodeTelemetry: NodeInfoEntity?
+
+	// Computed property
+	var dewPoint: Float? {
+		guard let temp = self.temperature, let rh = self.relativeHumidity else {
+			return nil
+		}
+		return Float(calculateDewPoint(temp: temp, relativeHumidity: rh, convertToLocale: false))
+	}
+
+	init() {}
+}