feat(ebe): added EBE api for mpc v2

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[Copilot]

Pull Request Overview

This PR adds support for MPC v2 key generation workflows by introducing three new endpoints (initialize, round, finalize) in the Enclaved API, along with their handlers, type definitions, integration tests, and a new MPC library dependency.

• Added MPC v2 request/response types and HTTP routes in the API spec
• Implemented mpcV2Initialize, mpcV2Round, and mpcV2Finalize handlers
• Created end-to-end integration tests for the full MPC v2 flow and updated package.json

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
src/enclavedBitgoExpress/routers/enclavedApiSpec.ts	Define MPC v2 types and register new API routes for initialize/round/finalize
src/api/enclaved/handlers/mpcV2Initialize.ts	Handler logic for MPC v2 initialization
src/api/enclaved/handlers/mpcV2Round.ts	Handler logic for each MPC v2 round
src/api/enclaved/handlers/mpcV2Finalize.ts	Handler logic to finalize MPC v2 protocol
src/tests/api/enclaved/postMpcV2Key.test.ts	Integration tests covering the entire MPC v2 lifecycle
package.json	Added @bitgo/sdk-lib-mpc dependency

Comments suppressed due to low confidence (1)

src/enclavedBitgoExpress/routers/enclavedApiSpec.ts:172

• The response field is named broadcastMessage (singular) but tests and other logic expect broadcastMessages (plural). Rename this field for consistency.

  broadcastMessage: optional(t.any),

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Duplicate with PR: #54