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/config-utils.sh

@@ -0,0 +1,69 @@
+#!/usr/bin/env bash
+# Configuration Utility Functions
+# Consolidated functions from small config-related scripts
+# Usage: source "$(dirname "${BASH_SOURCE[0]}")/../utils/config-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
+
+# Validate config file
+config_validate() {
+    local config_file="$1"
+    
+    if [ -f "$config_file" ]; then
+        log_success "Configuration file exists: $config_file"
+        return 0
+    else
+        log_error "Configuration file missing: $config_file"
+        return 1
+    fi
+}
+
+# Backup config file
+config_backup() {
+    local config_file="$1"
+    local backup_file="${config_file}.backup.$(date +%Y%m%d_%H%M%S)"
+    
+    if [ -f "$config_file" ]; then
+        cp "$config_file" "$backup_file"
+        log_success "Backed up: $config_file → $backup_file"
+        return 0
+    else
+        log_error "Config file not found: $config_file"
+        return 1
+    fi
+}
+
+# Get config value
+config_get() {
+    local config_file="$1"
+    local key="$2"
+    
+    if [ -f "$config_file" ]; then
+        grep "^${key}=" "$config_file" | cut -d'=' -f2- | sed 's/^["'\'']//;s/["'\'']$//'
+    fi
+}
+
+# Set config value
+config_set() {
+    local config_file="$1"
+    local key="$2"
+    local value="$3"
+    
+    if [ -f "$config_file" ]; then
+        if grep -q "^${key}=" "$config_file"; then
+            sed -i "s|^${key}=.*|${key}=${value}|" "$config_file"
+        else
+            echo "${key}=${value}" >> "$config_file"
+        fi
+        log_success "Set ${key}=${value} in $config_file"
+    else
+        log_error "Config file not found: $config_file"
+        return 1
+    fi
+}