fix(http): use prefix match for metadata query filter

Replace strings.Contains with strings.HasPrefix so that keys like 'foo.metadata.bar' are correctly rejected instead of being treated as metadata filters.

X-Lerian-Ref: 0x1

Author: arthurkz

pkg/net/http/http-utils.go

@@ -171,7 +171,7 @@ func ValidateParameters(params map[string]string) (*QueryHeader, error) {
 
 	for key, value := range params {
 		switch {
-		case strings.Contains(key, "metadata."):
+		case strings.HasPrefix(key, "metadata."):
 			if qh.Metadata == nil {
 				qh.Metadata = &bson.M{}
 			}