fix(worker): surface the real reason a Claude run failed instead of a generic exit-code message

StreamAnalyzer now reads subtype/terminal_reason/errors from the CLI's result
event, and TaskRunner builds a specific ErrorMarkdown from them: max_turns names
the turn budget and points at set_task_config + requeue, api_error passes
through the provider's own message (which carries the reset time), and any
other terminal_reason is appended to the previous generic text instead of
staying invisible. Falls through to the old "exited with code N and no result"
text when there's no terminal_reason at all (a real crash).

src/ClaudeDo.Worker/Runner/StreamAnalyzer.cs

@@ -13,6 +13,9 @@ public sealed class StreamResult
     public int TokensOut { get; set; }
     public int ApiRetryCount { get; set; }
     public IReadOnlyList<string> Blocks { get; set; } = Array.Empty<string>();
+    public string? ResultSubtype { get; set; }
+    public string? TerminalReason { get; set; }
+    public IReadOnlyList<string> Errors { get; set; } = Array.Empty<string>();
 }
 
 public sealed class StreamAnalyzer
@@ -25,6 +28,9 @@ public sealed class StreamAnalyzer
     private int _tokensOut;
     private int _apiRetryCount;
     private readonly List<string> _blocks = new();
+    private string? _resultSubtype;
+    private string? _terminalReason;
+    private readonly List<string> _errors = new();
     private const string BlockedPrefix = "CLAUDEDO_BLOCKED:";
 
     public void ProcessLine(string ndjsonLine)
@@ -48,6 +54,17 @@ public sealed class StreamAnalyzer
                         _structuredOutputJson = structuredProp.ToString();
                     if (root.TryGetProperty("session_id", out var sessionProp))
                         _sessionId = sessionProp.GetString();
+                    if (root.TryGetProperty("subtype", out var resultSubtypeProp))
+                        _resultSubtype = resultSubtypeProp.GetString();
+                    if (root.TryGetProperty("terminal_reason", out var terminalReasonProp))
+                        _terminalReason = terminalReasonProp.GetString();
+                    if (root.TryGetProperty("errors", out var errorsProp) && errorsProp.ValueKind == JsonValueKind.Array)
+                    {
+                        foreach (var errorItem in errorsProp.EnumerateArray())
+                            if (errorItem.ValueKind == JsonValueKind.String && errorItem.GetString() is { } errorText
+                                && !string.IsNullOrEmpty(errorText))
+                                _errors.Add(errorText);
+                    }
                     // Authoritative token totals live on the result event.
                     if (root.TryGetProperty("usage", out var resultUsage))
                     {
@@ -87,6 +104,9 @@ public sealed class StreamAnalyzer
         TokensOut = _tokensOut,
         ApiRetryCount = _apiRetryCount,
         Blocks = _blocks.Distinct().ToList(),
+        ResultSubtype = _resultSubtype,
+        TerminalReason = _terminalReason,
+        Errors = _errors,
     };
 
     private string? FallbackResult()