fix: import TextCrossEncoder from source module and drop redundant re-export

Removed the unused re-export of TextCrossEncoder from
qwen3_embed/rerank/cross_encoder/__init__.py. Updated higher-level
__init__.py files to import TextCrossEncoder directly from its
source module to maintain the public API while cleaning up
the intermediate re-export.

Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>

Author: n24q02m

qwen3_embed/__init__.py

@@ -2,7 +2,7 @@
 
 from qwen3_embed.common.custom_model import CustomModelSpec, CustomRerankerSpec
 from qwen3_embed.common.types import Device
-from qwen3_embed.rerank.cross_encoder import TextCrossEncoder
+from qwen3_embed.rerank.cross_encoder.text_cross_encoder import TextCrossEncoder
 from qwen3_embed.text import TextEmbedding
 
 try:

qwen3_embed/rerank/__init__.py

@@ -1,3 +1,3 @@
-from qwen3_embed.rerank.cross_encoder import TextCrossEncoder
+from qwen3_embed.rerank.cross_encoder.text_cross_encoder import TextCrossEncoder
 
 __all__ = ["TextCrossEncoder"]

qwen3_embed/rerank/cross_encoder/__init__.py

@@ -1,3 +0,0 @@
-from qwen3_embed.rerank.cross_encoder.text_cross_encoder import TextCrossEncoder
-
-__all__ = ["TextCrossEncoder"]