Upgraded to version 3.7:

### Implemented a backward-compatible configuration extension allowing users to define reusable prior or fixed specifications in a top-level `priors:` section and reference them throughout the configuration using the `"@name"` syntax.

- **Global Tying:** Multiple parameters referencing the same `@name` are mapped to a single shared latent variable (global tie), ensuring they share the same sampled value across different sections (e.g., sharing a GP period across multiple instruments or between a GP and a planet).

### Architecture Refactor — Modular Sampling and Reporting Packages