Merge pull request #583 from ie3-institute/to/#582-rfc-compliancy

apply rfc compliance to csv sink

Author: sebastian-peter

src/main/java/edu/ie3/datamodel/io/sink/CsvFileSink.java

@@ -326,6 +326,7 @@ private <C extends UniqueEntity> void write(C entity) {
       entityFieldData =
           processorProvider
               .handleEntity(entity)
+              .map(this::csvEntityFieldData)
               .orElseThrow(
                   () ->
                       new SinkException(