Lexical form not valid for datatype XSD dateTime

[Summm1t]

Describe the bug
When running the "Server can do Timebased Fragmentation of an LDES" LdesServerFragmentationIT test, we get the "Lexical form not valid for datatype XSD dateTime" error in the logs.

To Reproduce
Steps to reproduce the behavior:

1. Run LdesServerFragmentationIT
2. See error
   2025-11-04T09:47:08.489+01:00 WARN 48629 --- [aitility-thread] org.apache.jena.riot : [line: 28, col: 38] Lexical form '2025-11-04T00:00' not valid for datatype XSD dateTime 2025-11-04T09:47:08.489+01:00 WARN 48629 --- [aitility-thread] org.apache.jena.riot : [line: 33, col: 38] Lexical form '2025-11-04T00:00' not valid for datatype XSD dateTime 2025-11-04T09:47:08.509+01:00 WARN 48629 --- [aitility-thread] org.apache.jena.riot : [line: 28, col: 38] Lexical form '2025-11-04T00:00' not valid for datatype XSD dateTime 2025-11-04T09:47:08.509+01:00 WARN 48629 --- [aitility-thread] org.apache.jena.riot : [line: 33, col: 38] Lexical form '2025-11-04T00:00' not valid for datatype XSD dateTime

Expected behavior
There should be a valid XSD dateTime for the time-based fragmentations

Desktop (please complete the following information):

• OS: Mac OS 15.6.1
• Version 3.6.3-SNAPSHOT

Additional context
Add breakpoint to be.vlaanderen.informatievlaanderen.ldes.server.fragmentisers.timebasedhierarchical.services.TimeBasedBucketCreator#createBucket(be.vlaanderen.informatievlaanderen.ldes.server.fragmentation.entities.Bucket, java.lang.String, be.vlaanderen.informatievlaanderen.ldes.server.fragmentisers.timebasedhierarchical.constants.Granularity)