fix: build

Author: Angular2Guy

backend/src/main/java/ch/xxx/aidoclibchat/adapter/repository/DocumentVSRepositoryBean.java

@@ -20,7 +20,7 @@
 import org.postgresql.util.PGobject;
 import org.springframework.ai.document.Document;
 import org.springframework.ai.embedding.EmbeddingModel;
-import org.springframework.ai.vectorstore.PgVectorStore;
+import org.springframework.ai.vectorstore.pgvector.PgVectorStore;
 import org.springframework.ai.vectorstore.SearchRequest;
 import org.springframework.ai.vectorstore.VectorStore;
 import org.springframework.ai.vectorstore.filter.Filter;