https://skmtc.net/open-feature/apis/openfeature-remote-evaluation-protocol-ofrep/docs/ofrep/v1/evaluate/flags/:key/post 2026-08-01 0.5 https://skmtc.net/open-feature/apis/openfeature-remote-evaluation-protocol-ofrep/docs/ofrep/v1/evaluate/flags/post 2026-08-01 0.5