Extends the existing ApiExceptionHandler @RestControllerAdvice to map
DateTimeParseException and IllegalArgumentException to 400 Bad Request.
Logs and agent-events endpoints both parse ISO-8601 query params and
previously leaked parse failures as internal server errors. All
IllegalArgumentException throw sites in production code are
input-validation usages (slug validation, containerConfig validation,
cursor decoding), so mapping to 400 is correct across the board.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
a0a0635ddd