[real-value/wallet] Add pilot wallet proof command

[FlowmemoryAI]

Objective

Add the dedicated wallet/operator proof command required by the final real-value pilot gate:

npm run flowchain:real-value-pilot:wallet

Acceptance Criteria

• Command exists at the repo root and runs wallet/operator pilot validation without committing secrets.
• Operator wallet signs pilot acknowledgement, bridge credit acknowledgement, withdrawal intent, release evidence, and emergency messages.
• Verification rejects wrong chain ID, wrong contract, wrong operator, mutated payload, replay nonce, expired message, and missing cap fields.
• Public metadata export excludes private keys, seed phrases, mnemonics, RPC credentials, API keys, and webhooks.
• Operator docs name exact next commands and no-secret boundaries.
• Records exact commands, reports, blockers, allowed folders, and forbidden folders in the PR.

Out Of Scope

• Custody claims, audited cryptography claims, or production wallet readiness claims.

[FlowmemoryAI]

HQ refresh after PR #132 merged to main:

• Local worktree inspected: E:\FlowMemory\flowmemory-live-wallet on agent/real-value-pilot-wallet.
• Branch checklist reports the wallet/operator proof complete: pilot schemas, public metadata boundary, fail-closed config validation, cap guardrails, signing/validation CLI, pilot E2E, negative cases, next-command CLI, metadata mismatch checks, public-envelope verification, secret-pattern scan, import checks, and product E2E under the documented optional-Slither path.
• No PR currently exists for agent/real-value-pilot-wallet.
• Main still has no dedicated npm run flowchain:real-value-pilot:wallet, so the strict HQ gate still fails on this proof row.

Next integration action: rebase/freshen the wallet branch onto main commit 14f378b, add the root proof command that delegates to the branch wallet/operator E2E, rerun npm test --prefix crypto, product wallet smoke, pilot wallet E2E, unsafe-claims/diff checks, and product E2E, then open a PR.

[FlowmemoryAI]

HQ recheck after PR #141 on the wallet/operator branch:

• Worktree: E:\FlowMemory\flowmemory-live-wallet
• Branch: agent/real-value-pilot-wallet
• Current branch is not yet based on current main; it needs rebase/reconciliation with commit f384236.
• Branch-local crypto command exists: wallet:pilot-e2e in crypto/package.json.
• Root package does not yet expose the required dedicated flowchain:real-value-pilot:wallet command expected by the merged HQ gate.

Fresh commands run from that worktree:

npm run wallet:pilot-e2e --prefix crypto
node infra/scripts/check-unsafe-claims.mjs
git diff --check

Results:

• npm run wallet:pilot-e2e --prefix crypto passed: FLOWCHAIN_PILOT_WALLET_E2E_OK documents=5 envelopes=5 negativeCases=7.
• node infra/scripts/check-unsafe-claims.mjs passed.
• git diff --check passed with Windows line-ending warnings only.

Next action: rebase this branch onto current main, preserve the crypto pilot E2E, add root flowchain:real-value-pilot:wallet delegating to npm run wallet:pilot-e2e --prefix crypto, rerun wallet tests/product evidence, then open a PR linked to #136.