Stop framing the README as a Rust-vs-Python migration

Type

Task

Scope

Multi-theme or Platform

Skillset

engineering

Description

Context

The README still reads like a migration announcement — Rust-vs-Python framing, a parity section, and a "verify against the Python implementation" section pointing at the migration PR. That was useful during the switchover; it isn't anymore. This is the tool now, and someone landing on the repo shouldn't have to parse the history first.

Proposed change

In README.md:

• Drop "(Rust)" from the title and rewrite the opening so it says what the tool does (generate, validate, reconcile) instead of what it replaces.
• Delete the ## Parity strategy section.
• Delete the ## Verify against the Python implementation section.