feat(tempo): add resolveAccount hooks

[parvahuja]

Depends on #571. This branch is stacked on the channel store work so the session hook can see cached channel state.

What

• Added one Tempo resolveAccount hook shared by charge and session clients.
• Used the returned account for charge proof/transaction signing and session open/recover/voucher planning.
• Accepted canonical TIP-1020 primitive session voucher signatures for secp256k1, p256, and webAuthn accounts.

Why

Wallet and account SDKs need to decide which account signs each Tempo action, especially for access-key backed charge and session flows, without mppx depending on a specific account SDK.

Validation

• VITE_TEMPO_NETWORK=none pnpm exec vp test --run src/tempo/client/Charge.test.ts src/tempo/session/client/Session.test.ts src/tempo/session/precompile/Voucher.test.ts
• VITE_TEMPO_NETWORK=none pnpm exec vp test --run src/tempo/session/ src/tempo/client/Charge.test.ts
• pnpm check:types
• pnpm check:ci
• pnpm audit --ignore-registry-errors

[pkg-pr-new]

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npm i https://pkg.pr.new/mppx@576

commit: 753c6ea