chore(deps): update Effect 4 toolchain

[cevr]

Summary

• update all development dependencies
• use current Effect Option constructors in tests
• fix the oxlint-native inspector directive
• add a patch changeset for current Effect 4 RC validation

Independent review

• Counsel found no blocking issue
• Counsel confirmed the Effect 4 direction and package ownership

Validation

• bun run gate
• 347 tests passed
• all example gates passed