fix(python): huggingface TEI auth, procedural-memory content handling, and proxy pip auto-install (#6947)

mem0/embeddings/huggingface.py

@@ -1,4 +1,5 @@
 import logging
+import os
 from typing import Literal, Optional
 
 from openai import OpenAI
@@ -17,7 +18,8 @@ class HuggingFaceEmbedding(EmbeddingBase):
         super().__init__(config)
 
         if self.config.huggingface_base_url:
-            self.client = OpenAI(base_url=self.config.huggingface_base_url, api_key=self.config.api_key)
+            api_key = self.config.api_key or os.getenv("HUGGINGFACE_API_KEY") or "hf"
+            self.client = OpenAI(base_url=self.config.huggingface_base_url, api_key=api_key)
             self.config.model = self.config.model or "tei"
         else:
             self.config.model = self.config.model or "multi-qa-MiniLM-L6-cos-v1"