Port points calculations to rust

[samayala22]

Ported all the points calculation logic to be in-process and in pure Rust.

• CDF integration using Exp-Sinh method (semi-definite integrals)
• fitting using reparametrized MLE objective function and optimized using differential evolution + nelder-mead polish

Validation was done in 2 phases:

1. Verify SF function -> error around 0.03%
2. Verify fitting process (RMSE + KS metrics) -> between 6% worse to 15% better fit quality

Avg point difference (excluding outliers due to sus outdated fitting data in the api): 30 (3% difference).

[AlphaKeks]

Looks mostly good now! Because there's new query macros, you'll have to run cargo sqlx prepare --workspace -- --all-features from the repo root to update the .sqlx/ directory. Those files are used for compile-time query checking when no actual database is available (such as in CI). After that I'll approve a CI run.

I'll also check this against the production dataset later tonight to make sure the results look similar enough, and that perf is good.

[samayala22]

Have you checked against the production dataset yet ?