Indicates how imported documents are reconciled with the
existing documents created or imported before.
Values:
RECONCILIATION_MODE_UNSPECIFIED (0):
Defaults to INCREMENTAL.
INCREMENTAL (1):
Inserts new documents or updates existing
documents.
FULL (2):
Calculates diff and replaces the entire
document dataset. Existing documents may be
deleted if they are not present in the source
location.