Set DEBUG default level, remove isFlush workaround

Author: Fernando Fernandes

Sources/SwiftTrader/Common/SwiftTraderLogger.swift

@@ -31,16 +31,11 @@ public struct SwiftTraderLogger {
 
 public extension SwiftTraderLogger {
 
-    func log(level: Logger.Level = .info, message: @autoclosure () -> Logger.Message, isFlush: Bool) {
+    /// Logs the given message using the `.debug` level by default.
+    func log(level: Logger.Level = .debug, message: @autoclosure () -> Logger.Message) {
         guard isLoggingEnabled else {
             return
         }
         logger.log(level: level, message())
-        
-        // [Server-side support] (Vapor)
-        // Refer to https://github.com/vapor/vapor/issues/796
-        if isFlush {
-            fflush(stdout)
-        }
     }
 }

Sources/SwiftTrader/Network/NetworkRequest/NetworkRequestProtocol+Execution.swift

@@ -28,16 +28,14 @@ public extension NetworkRequest {
         } catch {
             return .failure(.invalidRequest(error: error))
         }
-        logger.log(message: "req... \(req)", isFlush: false)
-        logger.log(message: "FLUUUUSH", isFlush: true)
 #if os(macOS) || os(iOS)
         let result = await runOnApplePlatforms(request: req)
         switch result {
         case .success:
             return result
         case .failure:
             if attemptNumber <= settings.numberOfRetries {
-                logger.log(message: "Retrying... \(attemptNumber) of \(settings.numberOfRetries)", isFlush: false)
+                logger.log(message: "Retrying... \(attemptNumber) of \(settings.numberOfRetries)")
                 try? await Task.sleep(nanoseconds: 1_000_000_000 * settings.delayBetweenRetries)
                 return await execute(attemptNumber: attemptNumber + 1)
             } else {