refactor(worker): remove MessageParser (replaced by StreamAnalyzer)

src/ClaudeDo.Worker/Runner/MessageParser.cs

@@ -1,33 +0,0 @@
-using System.Text.Json;
-
-namespace ClaudeDo.Worker.Runner;
-
-public static class MessageParser
-{
-    public static bool TryExtractResult(string ndjsonLine, out string? result)
-    {
-        result = null;
-        if (string.IsNullOrWhiteSpace(ndjsonLine))
-            return false;
-
-        try
-        {
-            using var doc = JsonDocument.Parse(ndjsonLine);
-            var root = doc.RootElement;
-
-            if (root.TryGetProperty("type", out var typeProp) &&
-                typeProp.GetString() == "result" &&
-                root.TryGetProperty("result", out var resultProp))
-            {
-                result = resultProp.GetString();
-                return true;
-            }
-        }
-        catch (JsonException)
-        {
-            // Malformed JSON — not a result line.
-        }
-
-        return false;
-    }
-}