Rename public-facing CodonGPT strings to CodonTranslator

src/models.py

@@ -1,6 +1,6 @@
 """
-Core model architectures for CodonGPT (GPT-only).
-- CodonGPT: Decoder-only GPT with two-species + protein prefix
+Core model architectures for CodonTranslator.
+- Decoder-only backbone with species + protein prefixing
 Includes a frozen ESM-C encoder for protein conditioning.
 """