feat : BaseToolParser.feed 增加可选 token_ids 参数

- format_chunk ABC 改为 (token, **kwargs)，body/token_ids 通过 kw 传入
- ProtocolHandler._handle_stream 逐 token encode 并透传
- Anthropic builder 用 **kwargs 吸收不使用的参数，零变更
- 新增 3 个 token_ids 参数测试

tests/inference/test_protocol.py

@@ -121,7 +121,7 @@ class TestOpenAIResponseBuilder:
         assert p["choices"][0]["finish_reason"] is None
 
     def test_format_chunk(self, builder):
-        events = builder.format_chunk("hello", "hello")
+        events = builder.format_chunk("hello", body="hello")
         payload = json.loads(events[0].split("data: ", 1)[1])
         assert payload["choices"][0]["delta"]["content"] == "hello"
         assert payload["choices"][0]["finish_reason"] is None
@@ -192,7 +192,7 @@ class TestAnthropicResponseBuilder:
         assert payloads[1]["type"] == "content_block_start"
 
     def test_format_chunk(self, builder):
-        events = builder.format_chunk("tok", "tok")
+        events = builder.format_chunk("tok", body="tok")
         payload = json.loads(events[0].split("data: ", 1)[1])
         assert payload["type"] == "content_block_delta"
         assert payload["delta"]["text"] == "tok"