fix/sdjwt import over oid4vc

[maycon-mello]

• feat: support importing decoded SD-JWT VC payloads
• honor issuer-advertised format in OID4VCI credential acquisition

[Copilot]

Pull request overview

This PR extends the wallet SDK’s credential import/acquisition flows to (1) accept decoded SD-JWT VC payload objects (not only compact SD-JWT strings) and (2) better respect issuer-advertised credential format/type during OID4VCI issuance.

Changes:

• Add support for recognizing/transforming decoded SD-JWT VC payload objects into W3C VC shape during import.
• Introduce OID4VCI helpers to pick the offered credential configuration and derive (format, credentialTypes) from it.
• Add unit/integration tests covering the new OID4VCI resolution logic and decoded SD-JWT payload import.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
packages/wasm/src/services/credential/service.ts	Uses new OID4VCI helper functions to determine format and credentialTypes during acquisition.
packages/wasm/src/services/credential/sd-jwt.ts	Adds decoded-payload detection + conversion path; extends SD-JWT identification to accept decoded payload objects.
packages/wasm/src/services/credential/oid4vci.js	New helper utilities for selecting offered config and resolving format/type.
packages/wasm/src/services/credential/oid4vci.test.js	Unit tests for offered-config resolution and format/type derivation.
packages/core/src/credential-provider.ts	Expands SD-JWT detection/conversion to allow object inputs (decoded payloads).
integration-tests/sd-jwt.test.ts	Integration test validating import of decoded SD-JWT payload object.

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[mike-parkhill]

how do we know the first entry in the array is the right one?

[maycon-mello]

good point, right now our API can only issue one format and this array is only used in the legacy flow. The latest OpenID specification will auto-select the proper option. But it's worth adding a filter here just to be safe