Add test for OpenSearchDB http_auth initialization

This commit introduces a new test validating the initialization of `OpenSearchDB` with `AWSV4SignerAuth` for HTTP authentication. Additionally, it updates the `poetry.lock` file to reflect dependencies changes with Poetry 2.1.1.

Related to mem0ai#2375

Author: mauricioalarcon

mem0/configs/vector_stores/opensearch.py

@@ -14,6 +14,7 @@ class OpenSearchConfig(BaseModel):
     verify_certs: bool = Field(False, description="Verify SSL certificates (default False for OpenSearch)")
     use_ssl: bool = Field(False, description="Use SSL for connection (default False for OpenSearch)")
     auto_create_index: bool = Field(True, description="Automatically create index during initialization")
+    http_auth: Optional[object] = Field(None, description="HTTP authentication method / AWS SigV4")
 
     @model_validator(mode="before")
     @classmethod
@@ -23,7 +24,7 @@ def validate_auth(cls, values: Dict[str, Any]) -> Dict[str, Any]:
             raise ValueError("Host must be provided for OpenSearch")
 
         # Authentication: Either API key or user/password must be provided
-        if not any([values.get("api_key"), (values.get("user") and values.get("password"))]):
+        if not any([values.get("api_key"), (values.get("user") and values.get("password")), values.get("http_auth")]):
             raise ValueError("Either api_key or user/password must be provided for OpenSearch authentication")
 
         return values

mem0/vector_stores/opensearch.py

@@ -2,7 +2,7 @@
 from typing import Any, Dict, List, Optional
 
 try:
-    from opensearchpy import OpenSearch
+    from opensearchpy import OpenSearch, RequestsHttpConnection
     from opensearchpy.helpers import bulk
 except ImportError:
     raise ImportError("OpenSearch requires extra dependencies. Install with `pip install opensearch-py`") from None
@@ -28,9 +28,10 @@ def __init__(self, **kwargs):
         # Initialize OpenSearch client
         self.client = OpenSearch(
             hosts=[{"host": config.host, "port": config.port or 9200}],
-            http_auth=(config.user, config.password) if (config.user and config.password) else None,
+            http_auth=config.http_auth if config.http_auth else ((config.user, config.password) if (config.user and config.password) else None),
             use_ssl=config.use_ssl,
             verify_certs=config.verify_certs,
+            connection_class=RequestsHttpConnection
         )
 
         self.collection_name = config.collection_name