Trajectory/episode recording.

[chenkins]

Objectives

• Persist snapshot (i.e. configuration and state), so a new recording can be started from there
• Run environment with given configuration and from given state
• Implement trajectory (refactoring/cleanup of the initial implementation 92 Add episodes for benchmarking and regression tests. #105 ) with reference to the diagram below.

Todos

• Implement trajectory feature based on Episodes for Performance Benchmarks and Regression Test #92 and Add episodes with malfunction for benchmarking and regression tests. #125
• Show feature completenesss of persistence in unit and regression tests (starting at any point)

Additional context
Depends on preparations in #118 and #125

Implementation Sketch