Add caching layer & pilot command

What's Changed

• Unit services check the agency payload by @JustHumanz in #293
• Print payload info by @JustHumanz in #294
• Remove payload info when new unit added by @JustHumanz in #297
• Add Cache layer by @JustHumanz in #298
• Remove request log in unit services by @JustHumanz in #299
• Upgrade golang version by @JustHumanz in #302
• Change remap payload by @JustHumanz in #304
• Add cache layer by @JustHumanz in #307
• Add pilot commands by @JustHumanz in #308

Full Changelog: v4.7.1...v4.8.0