Seven new built-in pricing functions

We added seven built-in functions across Rosetta, Elo, and Jale, bringing the catalog to fifteen pricing primitives you can call by name with no setup.

The built-in catalog grew from eight to fifteen. Every function is token-metered, callable from any SDK, and works the same way an AI agent would invoke it from a tool manifest.

**Rosetta**: `translate`, `normalize`, `validate`, `suggest`, `freeze`, and `ingest` for canonical-schema translation and autonomous merchant onboarding

**Elo**: `ab-test`, `significance`, and `allocator` for live experimentation on pricing variants

**Jale**: optimizer, elasticity, advanced, psychological, bundle, and tier-optimizer for end-to-end revenue and margin shaping

All fifteen share the same metering rate and the same input/output schemas, so swapping one for another is a single string change