docs: Ledger Live integration, contract deploy learnings, NEXT_STEPS updates

- ADD_CHAIN138_TO_LEDGER_LIVE: Ledger form done; public code review repo bis-innovations/LedgerLive; init/push commands
- CONTRACT_DEPLOYMENT_RUNBOOK: Chain 138 gas price 1 gwei, 36-addr check, TransactionMirror workaround
- CONTRACT_*: AddressMapper, MirrorManager deployed 2026-02-12; 36-address on-chain check
- NEXT_STEPS_FOR_YOU: Ledger done; steps completable now (no LAN); run-completable-tasks-from-anywhere
- MASTER_INDEX, OPERATOR_OPTIONAL, SMART_CONTRACTS_INVENTORY_SIMPLE: updates
- LEDGER_BLOCKCHAIN_INTEGRATION_COMPLETE: bis-innovations/LedgerLive reference

Co-authored-by: Cursor <cursoragent@cursor.com>

scripts/verify/run-shellcheck.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+# Run shellcheck on verification scripts (optional — requires shellcheck to be installed).
+# Usage: bash scripts/verify/run-shellcheck.sh [--optional]
+#   --optional: exit 0 if shellcheck not installed (for CI where shellcheck is optional).
+# Install: apt install shellcheck  (or brew install shellcheck)
+
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+cd "$SCRIPT_DIR"
+OPTIONAL=false
+[[ "${1:-}" == "--optional" ]] && OPTIONAL=true
+
+if ! command -v shellcheck &>/dev/null; then
+  echo "shellcheck not found. Install with: apt install shellcheck  (or brew install shellcheck)"
+  [[ "$OPTIONAL" == true ]] && exit 0 || exit 1
+fi
+
+echo "Running shellcheck on scripts/verify/*.sh..."
+shellcheck -x ./*.sh
+echo "Done."