Updates Neo4jChatMessageHistory to use neo4j-graphrag queries

[alexthomas93]

Description

• Refactors Neo4jChatMessageHistory to use Cypher queries from the neo4j-graphrag package.
• Renames the type property to role on Message nodes saved by the Neo4jChatMessageHistory class.
• Adds a delete_session_node parameter to Neo4jChatMessageHistory's clear method allowing developers to optionally select if they want to delete the Session node along with all Message nodes in a chat message chain.

Type of Change

• New feature
• Bug fix
• Breaking change
• Project configuration change

Complexity

Low

How Has This Been Tested?

• Unit tests
• Integration tests
• Manual tests

Checklist

• Unit tests updated
• Integration tests updated
• CHANGELOG.md updated

[alexthomas93]

@CodiumAI-Agent /update_changelog

[CodiumAI-Agent]

Changelog updates: 🔄

2025-02-26

Changed

• Refactored Neo4jChatMessageHistory to use Cypher queries from the neo4j-graphrag package.
• Renamed the type property to role on Message nodes in Neo4jChatMessageHistory.

Added

• Introduced a delete_session_node parameter to the clear method in Neo4jChatMessageHistory for optional deletion of the Session node.

to commit the new content to the CHANGELOG.md file, please type:
'/update_changelog --pr_update_changelog.push_changelog_changes=true'