fix(qdrant): support Long type in payload by converting to String

Qdrant does not support java.lang.Long as a native payload type.
Previously, passing a Long value caused the following exception:

  java.lang.IllegalArgumentException: Unsupported Qdrant value type: class java.lang.Long
    at org.springframework.ai.vectorstore.qdrant.QdrantValueFactory.value(QdrantValueFactory.java:85)
    at org.springframework.ai.vectorstore.qdrant.QdrantValueFactory.lambda$toValueMap$1(QdrantValueFactory.java:46)
    ...

To resolve this, Long values are now converted to their String representation
in QdrantValueFactory. This preserves precision and avoids serialization issues.

Signed-off-by: Solomon Hsu <[email protected]>

Author: solnone

vector-stores/spring-ai-qdrant-store/src/main/java/org/springframework/ai/vectorstore/qdrant/QdrantValueFactory.java

@@ -75,6 +75,9 @@ private static Value value(Object value) {
 				return ValueFactory.value((String) value);
 			case "Integer":
 				return ValueFactory.value((Integer) value);
+			case "Long":
+				// use String representation
+				return ValueFactory.value(String.valueOf(value));
 			case "Double":
 				return ValueFactory.value((Double) value);
 			case "Float":