feat(vertex): add Claude Opus 4.7 support

[saneroen]

Related GitHub Issue

Closes: #12134

Roo Code Task Context (Optional)

N/A

Description

This PR adds Vertex AI support for Claude Opus 4.7 (claude-opus-4-7) by following the existing Opus 4.6 integration pattern.

Implementation details:

• Added claude-opus-4-7 to Vertex model definitions in vertexModels.
• Included claude-opus-4-7 in VERTEX_1M_CONTEXT_MODEL_IDS so 1M-context behavior uses the existing Vertex flow.
• Added test coverage in anthropic-vertex.spec.ts to verify 1M context + tier pricing behavior for Opus 4.7.

Test Procedure

1. Install dependencies:
   • corepack pnpm install
2. Run targeted test:
   • cd src && corepack pnpm vitest run api/providers/__tests__/anthropic-vertex.spec.ts
3. Expected result:
   • 1 test file passed, 32 tests passed

Pre-push checks also passed (lint + check-types).

Pre-Submission Checklist

• Issue Linked: This PR is linked to an approved GitHub Issue (see "Related GitHub Issue" above).
• Scope: My changes are focused on the linked issue (one major feature/fix per PR).
• Self-Review: I have performed a thorough self-review of my code.
• Testing: New and/or updated tests have been added to cover my changes (if applicable).
• Documentation Impact: I have considered if my changes require documentation updates (see "Documentation Updates" section below).
• Contribution Guidelines: I have read and agree to the Contributor Guidelines.

Screenshots / Videos

N/A (no UI changes)

Documentation Updates

• No documentation updates are required.
• Yes, documentation updates are required.

Additional Notes

Branch: feat/vertex-claude-opus-4-7
Commit: 3d4cba43b1c48c4a104ddef27c1300de0b2c5327

Get in Touch

Discord: santy2509

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