chore: upgrade ucantone

[alanshaw]

Upgrades to the new ucantone version and deals with the fallout.

refs fil-forge/smelt#7

[Copilot]

Pull request overview

Upgrades ucantone (and related dependencies) and refactors the delegator service to use the newer multikey/identity APIs across the runtime service, CLI generation command, client types, and system tests.

Changes:

• Bump github.com/fil-forge/ucantone and github.com/fil-forge/libforge (plus related indirect deps).
• Migrate service wiring from principal.Signer to identity.Identity and update UCAN issuance/verification calls accordingly.
• Update DID document handling to return a did.Document and adjust tests/client to match.

Reviewed changes

Copilot reviewed 7 out of 8 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
test/system_test.go	Updates test issuers/proofs generation to multikey/issuer APIs and adjusts DID document assertions.
internal/services/registrar/delegator.go	Switches delegator service identity from principal.Signer to identity.Identity and updates DID verification parsing.
internal/providers/providers.go	Updates Fx provider to construct and return identity.Identity from key material.
internal/handlers/handlers.go	Uses identity.Identity.DIDDocument() for DID document endpoint and updates handler wiring types.
cmd/gen.go	Updates delegation generation command to use multikey signer/issuer flow and new PEM decode helper.
client/client.go	Changes DID document client to decode into did.Document.
go.mod	Dependency bumps for ucantone, libforge, and related indirects.
go.sum	Updates checksums consistent with the dependency upgrades.

Comments suppressed due to low confidence (1)

test/system_test.go:134

• In this helper, the fatal error message still says "indexing proof" even though this function generates the egress-tracking proof. This makes failures harder to diagnose when tests fail.

	if err != nil {
		t.Fatalf("failed to create indexing proof: %v", err)
	}

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.