SeedReport: Saving & Replaying RNG seed capability.

[drewconnelly-qntm]

Changes:

In crates/pecos-engines/src/monte_carlo/engine.rs:

• Introduces SeedReport which stores the RNG seed information for a monte carlo run
• Introduces run_with_workers_seed_report which runs a monte carlo job with workers, while managing the RNG seeds with a seed report. Has a bool option to save the report to a JSON names seed_report.json.
• Introduces WorkerSeedRecord which stores the worker index, num shots, and seed for that worker, which is what is held in a vector inside the overall job's SeedReport for each monte carlo job.
• Introduces methods for saving a SeedReport to JSON as well as loading them from JSON.

Potential Future Work:

• Lets work start up on Error Pruning, Visualizing now that we can save monte carlo runs and rerun them.
• Opens the possibility for single-shot replaying, so the user can identify a particular shot (or maybe all shots with logical failures) and rerun that exact shot. Right now only rerunning the entire monte carlo job is permitted.

Testing:

cargo test -p pecos-engines was all good
just build; just test ran through the rust tests fine but had issues with the python pytests due to some bugs with my environment locally.

[qciaran]

I haven't looked closely but just skimming things: You might want to see if you can do this without using an Arc Mutex. They are slightly expensive.

[drewconnelly-qntm]

I haven't looked closely but just skimming things: You might want to see if you can do this without using an Arc Mutex. They are slightly expensive.

Thanks, I'll check on how necessary that is.