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-docker.sh

@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+# Run shellcheck on verification scripts using Docker when shellcheck is not installed.
+# Usage: bash scripts/verify/run-shellcheck-docker.sh
+# Prefer: apt install shellcheck && bash scripts/verify/run-shellcheck.sh
+
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+PROJECT_ROOT="$(cd "$SCRIPT_DIR/../.." && pwd)"
+
+if command -v shellcheck &>/dev/null; then
+  echo "Using system shellcheck..."
+  cd "$SCRIPT_DIR" && shellcheck -x *.sh
+  exit 0
+fi
+
+if command -v docker &>/dev/null; then
+  echo "Using Docker image koalaman/shellcheck-alpine..."
+  docker run --rm -v "$SCRIPT_DIR:/mnt:ro" -w /mnt koalaman/shellcheck-alpine:latest shellcheck -x ./*.sh
+  exit 0
+fi
+
+echo "shellcheck not found. Install with: apt install shellcheck"
+echo "Or use Docker: docker run --rm -v $SCRIPT_DIR:/mnt:ro -w /mnt koalaman/shellcheck-alpine:latest -x *.sh"
+exit 1