Northern California’s record-setting rains have eased drought anxieties for now, but maintaining the supply of water vital to Marin and Sonoma County agriculture will require constant vigilance, according to a new report. The dry weather that ravaged the region from 2019 to 2022 underlined the urgency of preparedness in the face of the extreme weather wrought by climate change, a report compiled by more than a dozen local, state and federal agencies and nonprofits found.…