Refactor for production

[jar-o]

• [x] refactor kludge of PoC, normalize internals, naming collisions, flesh out tests
• [x] add github actions
• [x] remove fixed cadence for step
• [x] osm/poke no-op logic
• [x] Median, reduce calldata size - https://app.shortcut.com/chronicle-labs/story/517/median-cost-savings-change-age-in-poke-calldata-to-uint32
• [x] update all docs
• [x] modes of attack and error

[shortcut-integration[bot]]

This pull request has been linked to Shortcut Story #925: OSM/Median implementation first rev.