SACRAMENTO, Calif. — Coronavirus infections have continued a steady climb in California since early April, and while the curve of new cases remains less steep than winter’s omicron variant surge, the rising spread of two contagious subvariants is still prompting concern about a fresh wave of virus cases. The California Department of Public Health on Friday reported the statewide daily case rate for COVID-19 at 14 per 100,000 residents, a 27% increase in the past week and up 71% in the past two weeks. Test positivity has spiked from 2.8% to 3.9% in the past week for California’s highest reading…