add embedding_bathc_num and embedding_func_max_async to env

lightrag/lightrag.py

@@ -183,10 +183,10 @@ class LightRAG:
     embedding_func: EmbeddingFunc | None = field(default=None)
     """Function for computing text embeddings. Must be set before use."""
 
-    embedding_batch_num: int = field(default=32)
+    embedding_batch_num: int = field(default=int(os.getenv("EMBEDDING_BATCH_NUM", 32)))
     """Batch size for embedding computations."""
 
-    embedding_func_max_async: int = field(default=16)
+    embedding_func_max_async: int = field(default=int(os.getenv("EMBEDDING_FUNC_MAX_ASYNC", 16)))
     """Maximum number of concurrent embedding function calls."""
 
     embedding_cache_config: dict[str, Any] = field(