gracedb-2.28.1

• add HasSSM source property to VOEvents (!224 (merged))
• add upload permissions for aframe scitoken accounts (!227 (merged))
• fix o4b end date (!229 (merged))
• Parse CHIME FRB ID and duration (!230 (merged))
• increase upload size (!231 (merged))
• add permission-clearing management tool (!186 (merged))
• fix table error for non-number em_bright values (#353 (closed))