feat: add msglib receive adapter

internal/tools/isphere_read.go

@@ -131,8 +131,8 @@ func receiveMessagesResultToMap(result isphere.ReceiveMessagesResult, started ti
 			"subject":           message.Subject,
 			"receipt_id":        message.ReceiptID,
 			"read":              message.Read,
-			"source":            "local_readonly",
-			"raw_ref":           "packetlog_message",
+			"source":            receiveMessageSource(message),
+			"raw_ref":           receiveMessageRawRef(message),
 		})
 	}
 	return map[string]any{
@@ -244,6 +244,18 @@ func contractConversationType(value string) string {
 }
 
 func receiveMessageAttachments(message isphere.Message) []map[string]any {
+	if len(message.Attachments) > 0 {
+		attachments := make([]map[string]any, 0, len(message.Attachments))
+		for _, attachment := range message.Attachments {
+			attachments = append(attachments, map[string]any{
+				"file_id":      attachment.FileID,
+				"file_name":    attachment.FileName,
+				"size_bytes":   attachment.SizeBytes,
+				"download_ref": nullableString(attachment.DownloadRef),
+			})
+		}
+		return attachments
+	}
 	files := isphere.ListFilesFromMessages([]isphere.Message{message}, isphere.ListFilesQuery{})
 	attachments := make([]map[string]any, 0, len(files.Files))
 	for _, file := range files.Files {
@@ -257,6 +269,20 @@ func receiveMessageAttachments(message isphere.Message) []map[string]any {
 	return attachments
 }
 
+func receiveMessageSource(message isphere.Message) string {
+	if strings.TrimSpace(message.Source) != "" {
+		return message.Source
+	}
+	return "local_readonly"
+}
+
+func receiveMessageRawRef(message isphere.Message) string {
+	if strings.TrimSpace(message.RawRef) != "" {
+		return message.RawRef
+	}
+	return "packetlog_message"
+}
+
 func receiveMessageContentType(message isphere.Message, attachments []map[string]any) string {
 	if len(attachments) > 0 {
 		return "file"