Values:
STATE_UNSPECIFIED (0):
Event state is not specified.
SCHEDULED (1):
Event is scheduled but not executed yet.
RUNNING (2):
Event is being executed.
SUCCEEDED (3):
Event has been successfully executed.
FAILED (4):
Event fails to be executed.
PENDING (5):
Event has been created but not scheduled yet.
STOPPED (6):
Event was stopped before running for its full
duration.