Production K8S server resources for v3 and add /v3 endpoints

What's Changed

• Update chiller cop call by @zolanaj in #496
• Update new django model additions with best practices by @Bill-Becker in #498
• Add v3 URLs by @Bill-Becker in #499
• Increase Julia pod CPU, decrease celery and Julia count for V3 by @Bill-Becker in #500
• Production K8S server resources for v3 and add /v3 endpoints by @Bill-Becker in #501

Full Changelog: v2.15.0...v2.16.0