Represents the current state of a workflow invocation.
Values:
STATE_UNSPECIFIED (0):
Default value. This value is unused.
RUNNING (1):
The workflow invocation is currently running.
SUCCEEDED (2):
The workflow invocation succeeded. A terminal
state.
CANCELLED (3):
The workflow invocation was cancelled. A
terminal state.
FAILED (4):
The workflow invocation failed. A terminal
state.
CANCELING (5):
The workflow invocation is being cancelled,
but some actions are still running.
