Adding a Document to a neo4j vector store needlessly overwrites all its properties

[enricorampazzo]

spring-ai/vector-stores/spring-ai-neo4j-store/src/main/java/org/springframework/ai/vectorstore/Neo4jVectorStore.java

Line 125 in 9e18652

SET u = {}

Because of this line, when an existing node is added to the vector store, its existing properties are deleted, and only those added as document metadata are persisted.

This is needlessly destructive. I suggest to change line 125 to SET u = properties(u) so that existing properties are preserved