Improve octopus data caching, fix bug with solar calibration, docs

What's Changed

• Fix typos and improve clarity in documentation across multiple files by @Moohan in #4031
• Octopus component status - mark as valid after load from cache by @springfall2008 in #4055
• Fix issue with solar calibration returning 0 for no history data by @springfall2008 in #4054
• Change octopus free sessions to use 'storage' by @springfall2008 in #4049

Full Changelog: v8.40.6...v8.40.7