fix(e2e): adapt E2E tests to EdgeAgent seed callback API

[patextreme]

Problem

feat(agent): init now receives a seed callback (#233, commit a4cd164, shipped in 8.1.0) changed EdgeAgent.seed from a Seed value to an async closure, and updated the seed: initializer parameter from Seed? to (() async throws -> Seed)?:

public let seed: () async throws -> Seed          // was: public let seed: Seed
public init(..., seed: (() async throws -> Seed)? = nil)  // was: seed: Seed? = nil

The SDK unit tests (BackupWalletTests, PrismOnboardingInvitationTests) were updated in that same commit, but the E2E tests were not. As a result the e2e test target no longer compiles against the 8.x SDK:

DidcommAgentAbility.swift:100:19: error: cannot convert value of type 'Seed'
  to expected argument type '(() async throws -> Seed)?'

xcodebuild build-for-testing fails (** TEST BUILD FAILED **), so no E2E tests can run. This was surfaced by an integration run against the locally-hosted Identus stack (integration run #27693263471).

Solution

Update the three E2E sites that consume the seed to mirror the pattern already used by the unit tests (e.g. BackupWalletTests):

• DidcommAgentAbility.swift — pass a () async throws -> Seed closure to EdgeAgent's initializer. A local let seed = seed value copy is bound before the init so the escaping closure captures the value (not self), which both satisfies Swift's explicit-capture requirement and avoids a retain cycle.
• EdgeAgentWorkflow.swift — call try await edgeAgent.seed() instead of reading edgeAgent.seed directly (two sites: the prism/jwt credential-offer path and the createBackup path).

-            seed: seed
+            let seed = seed
+            ...
+            seed: { seed }

-            let seed = sdk.didcommAgent.edgeAgent.seed
+            let seed = try await sdk.didcommAgent.edgeAgent.seed()

No SDK public API or behavior is changed — this is a test-only fix.

Verification

Pointed the integration local-tunnel E2E suite at this branch and ran it to green. Verified suite: ** TEST EXECUTE SUCCEEDED ** — 23 tests executed, 0 failures (2 skipped).

• CI run: https://github.com/hyperledger-identus/integration/actions/runs/27696400618 (sdk-swift ref 8.1.1-rc.2 on this branch)
• Stack under test: cloud-agent 2.2.0, mediator 1.2.1, neoprism 0.14.1

Alternatives Considered

None. This follows the exact pattern the SDK's own unit tests adopted for the same breaking change, so the E2E tests stay consistent with the rest of the suite.

Checklist

• My PR follows the contribution guidelines of this project
• My PR is free of third-party dependencies that don't comply with the Allowlist
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• I have checked the PR title to follow the conventional commit specification

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud