Pyth Agent v2.9.0

This change refactors the code to simplify the design. Nothing has changed in the behaviour, but some performance improvement is expected after the refactors.

What's Changed

• refactor(agent): extract oracle component/service by @Reisen in #128
• refactor: remove warnings by @ali-bahjati in #129

Full Changelog: v2.8.0...v2.9.0