fix(documents): set publishDate on Document create (Marcus-Law requires it)

The server returned:
  400 {"messageTranslation":{"label":"validationFailure",
       "data":{"field":"publishDate","type":"required"}}}

Marcus-Law's EspoCRM install marks Document.publishDate as required.
By default the field is optional, but this tenant tightened it. Send
today's date (UTC, YYYY-MM-DD form) so the validation passes — the
user can still edit the published date in EspoCRM later if needed.

Also add the same verbose-error pattern to CreateDocumentAsync that we
already use on UploadAttachmentAsync: when the create returns non-2xx,
log the response body + X-Status-Reason header so any future required-
field mismatch shows up as a single readable line instead of
"שמירת הקבצים נכשלה".

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/OutlookAddin.Core/Services/EspoCrmClient.cs

@@ -262,21 +262,47 @@ namespace MarcusLaw.OutlookAddin.Core.Services
             if (string.IsNullOrWhiteSpace(name)) throw new ArgumentException("name required", nameof(name));
             if (string.IsNullOrWhiteSpace(attachmentFileId)) throw new ArgumentException("attachmentFileId required", nameof(attachmentFileId));
 
+            // Marcus-Law's EspoCRM has `publishDate` configured as required on
+            // Document. The field accepts a plain date (YYYY-MM-DD). Default
+            // to today; the user can edit it later in EspoCRM if needed.
+            var todayIso = DateTimeOffset.UtcNow.ToString("yyyy-MM-dd", System.Globalization.CultureInfo.InvariantCulture);
+
             var payload = new Dictionary<string, object?>
             {
                 ["name"] = name,
                 ["fileId"] = attachmentFileId,
-                ["status"] = "Active"
+                ["status"] = "Active",
+                ["publishDate"] = todayIso
             };
             if (!string.IsNullOrWhiteSpace(parentType)) payload["parentType"] = parentType;
             if (!string.IsNullOrWhiteSpace(parentId)) payload["parentId"] = parentId;
             if (!string.IsNullOrWhiteSpace(folderId)) payload["folderId"] = folderId;
 
             var json = JsonSerializer.Serialize(payload, JsonOptions);
+            _logger.Information(
+                "CreateDocument POST /Document (name={Name}, fileId={FileId}, parent={ParentType}/{ParentId}, folder={FolderId})",
+                name, attachmentFileId, parentType, parentId, folderId ?? "(none)");
+
             var response = await ExecuteAsync(HttpMethod.Post, "Document", json, cancellationToken).ConfigureAwait(false);
             try
             {
-                await EnsureSuccessAsync(response).ConfigureAwait(false);
+                if (!response.IsSuccessStatusCode)
+                {
+                    var errBody = await ReadBodyAsync(response).ConfigureAwait(false);
+                    var reason = response.Headers.TryGetValues("X-Status-Reason", out var v)
+                        ? string.Join(",", v) : "(none)";
+                    _logger.Warning(
+                        "CreateDocument failed: {Status} (X-Status-Reason={Reason}) body={Body}",
+                        response.StatusCode, reason, string.IsNullOrEmpty(errBody) ? "(empty)" : Truncate(errBody, 500));
+                    if (response.StatusCode == HttpStatusCode.Unauthorized || response.StatusCode == HttpStatusCode.Forbidden)
+                    {
+                        throw new EspoCrmAuthorizationException(
+                            $"EspoCRM rejected credentials ({(int)response.StatusCode} {response.StatusCode}). Re-enter API key.");
+                    }
+                    throw new EspoCrmHttpException(response.StatusCode, errBody,
+                        $"EspoCRM Document create returned {(int)response.StatusCode} {response.StatusCode}" +
+                        (string.IsNullOrEmpty(reason) ? "" : " (reason: " + reason + ")"));
+                }
                 var body = await ReadBodyAsync(response).ConfigureAwait(false);
                 return JsonSerializer.Deserialize<DocumentEntity>(body, JsonOptions)
                     ?? throw new EspoCrmHttpException(response.StatusCode, body, "Empty DocumentEntity from EspoCRM");