fix: E2 MustSetRandom all elements

[ivokub]

Description

MustSetRandom only set A0 value to random, not both.

Type of change

• Bug fix (non-breaking change which fixes an issue)

Checklist:

• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• I did not modify files generated from templates
• golangci-lint does not output errors locally
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

---

Note

Fixes incomplete randomization in E2.MustSetRandom by invoking SetRandom() (randomizes both A0 and A1).

• Updates E2.MustSetRandom in field/{babybear,goldilocks,koalabear}/extensions/e2.go
• Aligns internal/generator/field/template/extensions/e2.go.tmpl to generate the corrected behavior
• No other functional changes

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[Copilot]

Pull request overview

This PR fixes a bug in the E2.MustSetRandom() method where only the A0 field was being set to a random value instead of both A0 and A1 fields. The fix changes the implementation to call z.SetRandom() which correctly randomizes both fields.

Key changes:

• Updated the template file that generates E2 extension field implementations
• Regenerated all three affected field implementations (babybear, goldilocks, koalabear)

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
internal/generator/field/template/extensions/e2.go.tmpl	Fixed template to call z.SetRandom() instead of z.A0.SetRandom()
field/koalabear/extensions/e2.go	Generated file updated with the template fix
field/goldilocks/extensions/e2.go	Generated file updated with the template fix
field/babybear/extensions/e2.go	Generated file updated with the template fix