Add EventReport model

Sources/ElixxirDAppsSDK/Models/EventReport.swift

+import Foundation
+
+public struct EventReport: Equatable {
+  public init(
+    priority: Int,
+    category: String,
+    eventType: String,
+    details: String
+  ) {
+    self.priority = priority
+    self.category = category
+    self.eventType = eventType
+    self.details = details
+  }
+
+  public var priority: Int
+  public var category: String
+  public var eventType: String
+  public var details: String
+}
+
+extension EventReport: Codable {
+  enum CodingKeys: String, CodingKey {
+    case priority = "Priority"
+    case category = "Category"
+    case eventType = "EventType"
+    case details = "Details"
+  }
+
+  public static func decode(_ data: Data) throws -> EventReport {
+    try JSONDecoder().decode(Self.self, from: data)
+  }
+
+  public func encode() throws -> Data {
+    try JSONEncoder().encode(self)
+  }
+}

Tests/ElixxirDAppsSDKTests/Models/EventReportTests.swift

+import CustomDump
+import XCTest
+@testable import ElixxirDAppsSDK
+
+final class EventReportTests: XCTestCase {
+  func testCoding() throws {
+    let priority: Int = 1
+    let category = "Test Events"
+    let eventType = "Ping"
+    let details = "This is an example of an event report"
+    let jsonString = """
+    {
+      "Priority": \(priority),
+      "Category": "\(category)",
+      "EventType": "\(eventType)",
+      "Details": "\(details)"
+    }
+    """
+    let jsonData = jsonString.data(using: .utf8)!
+
+    let report = try EventReport.decode(jsonData)
+
+    XCTAssertNoDifference(report, EventReport(
+      priority: priority,
+      category: category,
+      eventType: eventType,
+      details: details
+    ))
+
+    let encodedReport = try report.encode()
+    let decodedReport = try EventReport.decode(encodedReport)
+
+    XCTAssertNoDifference(decodedReport, report)
+  }
+}