refactor: 管线写入依赖解耦——pipeline_write 直接 import

bzzoiro_events / bzzoiro_standings / bzzoiro_stats 直接 import
src.data.pipeline_write(_write_raw_event/_write_lineage/_safe_write_ingest_failure),
删除 bzzoiro.py 门面中的 pipeline_write 转发胶水。

保留 fetch_*/_fetch_json_async/REQUEST_INTERVAL 经 bz. 门面调用(测试 monkeypatch 入口);
测试 best-effort 改为 patch 管线模块自身命名空间(from-import 绑定语义)。
函数语义与「失败不拖垮主流程」不变;source_record_id/transform_name 约定不变。

全量测试 270 通过。

tests/test_events_bronze.py

@@ -255,11 +255,14 @@ class TestEventsBronzeOnUpdate:
 
 class TestEventsBronzeIsBestEffort:
     async def test_bronze_write_failure_does_not_break_ingest(self, monkeypatch):
+        import src.data.bzzoiro_events as bz_events
+
         async def _boom(*args, **kwargs):
             raise RuntimeError("infra down")
 
-        monkeypatch.setattr(bz, "_write_raw_event", _boom)
-        monkeypatch.setattr(bz, "_write_lineage", _boom)
+        # Bronze 写入助手直接 import 到 bzzoiro_events 命名空间,需 patch 该处
+        monkeypatch.setattr(bz_events, "_write_raw_event", _boom)
+        monkeypatch.setattr(bz_events, "_write_lineage", _boom)
         _patch_fetch(monkeypatch, [_event()])
         db = _FakeDB()