(Corrects length of detention to four months, not six, after official clarification) By Daniel Ramos and Monica Machicao LA PAZ/SANTA CRUZ, Bolivia (Reuters) -A Bolivian court sentenced right-wing opposition leader Luis Fernando Camacho to four months of pre-trial detention, a day after he was arrested in connection to 2019 social unrest that saw former leftist President Evo Morales flee the country. Camacho was arrested on Wednesday and taken to the political capital La Paz, sparking protests amid escalating tensions between his wealthy agricultural base in the region of Santa Cruz and the na…