feat(wits): 添加WITS数据包字符串转换功能

- 实现to_string方法将WITS对象转换为字符串格式
- 根据通道映射配置格式化不同类型的字段值
- 支持string、int和float6格式的数据类型转换
- 移除调试日志代码行

model/wits.py

@@ -90,6 +90,32 @@ class WitsData:
     def __post_init__(self):
         validate_required_wits_fields(self)
 
+    def to_string(self) -> str:
+        parts = []
+
+        for channel, field_name, field_type in WITS_CHANNEL_MAPPING:
+            value = getattr(self, field_name, None)
+
+            if value is None:
+                continue
+
+            if field_type == "string":
+                formatted = str(value)
+
+            elif field_type == "int":
+                formatted = str(int(value))
+
+            elif field_type == "float6":
+                formatted = f"{float(value):.6f}"
+
+            else:
+                formatted = str(value)
+
+            parts.append(f"{channel}{formatted}")
+
+        return "".join(parts)
+
+
 
 WITS_CHANNEL_MAPPING = [
     ("0101", "wellid", "string"),