Fireworks AI: Add Deepseek v3.1

[dmarkey]

What specific problem does this solve?

Fireworks AI provider missing new Deepseek v3.1 in dropdown

Additional context (optional)

No response

Roo Code Task Links (Optional)

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Request checklist

• I've searched existing Issues and Discussions for duplicates
• This describes a specific problem with clear impact and context

Interested in implementing this?

• Yes, I'd like to help implement this feature

Implementation requirements

• I understand this needs approval before implementation begins

How should this be solved? (REQUIRED if contributing, optional otherwise)

Deepseek v3.1 in the list.

How will we know it works? (Acceptance Criteria - REQUIRED if contributing, optional otherwise)

No response

Technical considerations (REQUIRED if contributing, optional otherwise)

No response

Trade-offs and risks (REQUIRED if contributing, optional otherwise)

No response

[roomote]

I'm exploring a potential fix for adding Deepseek v3.1 to the Fireworks AI provider dropdown and will open a PR to share progress.

[roomote]

Opened PR #7375 with my attempt at addressing this issue: #7375

The implementation adds Deepseek v3.1 to the Fireworks AI provider with:

• Model ID: accounts/fireworks/models/deepseek-v3p1 (using v3p1 to avoid dots in identifiers)
• Configuration matching v3 specifications
• Comprehensive test coverage

All CI checks have passed. Feedback welcome!