THE hum of workers breaks through the calm of this South Pacific island paradise, where swaying palms and sleepy lagoons bely Fiji's history of high intrigue and coup plots. The Indian High Commission at Suva is being spruced up for the new occupant, I.S. Chauhan. The political appointee, former vice chancellor of Barkatullah University and M.P. Bhoj Open University, is expected to assume his duties as the new high commissioner this May-marking the return of the Indian government's presence in the island idyll after a gap of nine years.