first commit

Services/ProcessRunner.cs

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+using System.Diagnostics;
+using HanaToolbox.Logging;
+using HanaToolbox.Services.Interfaces;
+
+namespace HanaToolbox.Services;
+
+/// <summary>Runs external processes and captures stdout/stderr.</summary>
+public sealed class ProcessRunner(AppLogger logger) : IProcessRunner
+{
+    public async Task<ProcessResult> RunAsync(
+        string executable, string[] args,
+        CancellationToken ct = default)
+    {
+        var psi = new ProcessStartInfo
+        {
+            FileName = executable,
+            RedirectStandardOutput = true,
+            RedirectStandardError = true,
+            UseShellExecute = false,
+            CreateNoWindow = true,
+        };
+        foreach (var arg in args) psi.ArgumentList.Add(arg);
+
+        logger.Info($"Exec: {executable} {string.Join(' ', args)}");
+
+        using var process = new Process { StartInfo = psi };
+        process.Start();
+
+        var stdoutTask = process.StandardOutput.ReadToEndAsync(ct);
+        var stderrTask = process.StandardError.ReadToEndAsync(ct);
+
+        await process.WaitForExitAsync(ct);
+
+        var stdout = await stdoutTask;
+        var stderr = await stderrTask;
+
+        logger.Info($"Exit code: {process.ExitCode}");
+        if (!string.IsNullOrWhiteSpace(stderr))
+            logger.Info($"Stderr: {stderr.Trim()}");
+
+        return new ProcessResult(process.ExitCode, stdout.Trim(), stderr.Trim());
+    }
+}