Values:
PHASE_UNSPECIFIED (0):
The phase of the migration job is unknown.
FULL_DUMP (1):
The migration job is in the full dump phase.
CDC (2):
The migration job is CDC phase.
PROMOTE_IN_PROGRESS (3):
The migration job is running the promote
phase.
WAITING_FOR_SOURCE_WRITES_TO_STOP (4):
Only RDS flow - waiting for source writes to
stop
PREPARING_THE_DUMP (5):
Only RDS flow - the sources writes stopped,
waiting for dump to begin