chore: Update WalletKit to use ZkArtifactSource trait

[Dzejkop]

Bumps world-id-protocol crates to 0.13

Aligns on the ZkArtifactSource API

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Note

Medium Risk
Touches authenticator initialization and ZK proof material loading across CLI, FFI, and tests; CI now runs all features including expensive compress paths, increasing blast radius if artifact APIs or caches misbehave.

Overview
Migrates WalletKit to the world-id-protocol 0.13 ZkArtifactSource API, replacing the local Groth16Materials type and cache_embedded_groth16_material flow with CachingZkArtifacts (filesystem cache + embedded material) and EmbeddedZkArtifacts (UniFFI-friendly wrappers). Authenticator::init and related entry points now take Arc<dyn WalletKitZkArtifactSource> instead of Groth16 materials; core init passes artifacts through to CoreAuthenticator.

Dependency and feature alignment: workspace pins world-id-core / world-id-proof 0.13, taceo-oprf 0.17, and routes embed-zkeys / compress-zkeys through world-id-proof (embed-zk-artifacts, zk-ownership-verify → embed-zk-artifacts). embed-zkeys becomes a default feature on walletkit-core until runtime artifact download exists.

CLI, testkit, and tooling: setup/wallet/proof paths use create_artifact_source / preload(); ownership verification takes an artifact source. register_account in testkit now requires a storage root for artifacts.

CI: WASM check enables embed-zkeys; Rust tests use cargo nextest with --workspace --all-features (replacing a narrower feature set); non-default-feature build uses --workspace.

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