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/utils/network-utils.sh

@@ -0,0 +1,54 @@
+#!/usr/bin/env bash
+# Network Utility Functions
+# Consolidated functions from small network-related scripts
+# Usage: source "$(dirname "${BASH_SOURCE[0]}")/../utils/network-utils.sh"
+
+set -euo pipefail
+
+# Load shared modules
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+PROJECT_ROOT="$(cd "$SCRIPT_DIR/../.." && pwd)"
+source "$SCRIPT_DIR/../lib/ip-config.sh" 2>/dev/null || true
+source "$SCRIPT_DIR/../lib/logging.sh" 2>/dev/null || true
+
+# Test network connectivity
+network_test() {
+    local ip="$1"
+    local port="${2:-}"
+    
+    if [ -n "$port" ]; then
+        if timeout 2 bash -c "</dev/tcp/$ip/$port" 2>/dev/null; then
+            log_success "Network connectivity OK: $ip:$port"
+            return 0
+        else
+            log_error "Network connectivity FAILED: $ip:$port"
+            return 1
+        fi
+    else
+        if ping -c 2 -W 2 "$ip" >/dev/null 2>&1; then
+            log_success "Network reachable: $ip"
+            return 0
+        else
+            log_error "Network unreachable: $ip"
+            return 1
+        fi
+    fi
+}
+
+# Get IP address
+network_get_ip() {
+    local interface="${1:-eth0}"
+    ip addr show "$interface" 2>/dev/null | grep -oP 'inet \K[\d.]+' | head -1
+}
+
+# Check DNS resolution
+network_check_dns() {
+    local hostname="$1"
+    if host "$hostname" >/dev/null 2>&1; then
+        log_success "DNS resolution OK: $hostname"
+        return 0
+    else
+        log_error "DNS resolution FAILED: $hostname"
+        return 1
+    fi
+}