feat: add marketplace metrics, privacy features, and service registry endpoints

- Add Prometheus metrics for marketplace API throughput and error rates with new dashboard panels
- Implement confidential transaction models with encryption support and access control
- Add key management system with registration, rotation, and audit logging
- Create services and registry routers for service discovery and management
- Integrate ZK proof generation for privacy-preserving receipts
- Add metrics instru

infra/terraform/modules/kubernetes/variables.tf

@@ -0,0 +1,75 @@
+variable "cluster_name" {
+  description = "Name of the EKS cluster"
+  type        = string
+}
+
+variable "environment" {
+  description = "Environment name (dev, staging, prod)"
+  type        = string
+}
+
+variable "aws_region" {
+  description = "AWS region"
+  type        = string
+  default     = "us-west-2"
+}
+
+variable "vpc_cidr" {
+  description = "CIDR block for VPC"
+  type        = string
+  default     = "10.0.0.0/16"
+}
+
+variable "private_subnet_cidrs" {
+  description = "CIDR blocks for private subnets"
+  type        = list(string)
+  default     = ["10.0.1.0/24", "10.0.2.0/24", "10.0.3.0/24"]
+}
+
+variable "public_subnet_cidrs" {
+  description = "CIDR blocks for public subnets"
+  type        = list(string)
+  default     = ["10.0.101.0/24", "10.0.102.0/24", "10.0.103.0/24"]
+}
+
+variable "availability_zones" {
+  description = "Availability zones"
+  type        = list(string)
+  default     = ["us-west-2a", "us-west-2b", "us-west-2c"]
+}
+
+variable "kubernetes_version" {
+  description = "Kubernetes version"
+  type        = string
+  default     = "1.28"
+}
+
+variable "enable_public_endpoint" {
+  description = "Enable public EKS endpoint"
+  type        = bool
+  default     = false
+}
+
+variable "desired_node_count" {
+  description = "Desired number of worker nodes"
+  type        = number
+  default     = 3
+}
+
+variable "min_node_count" {
+  description = "Minimum number of worker nodes"
+  type        = number
+  default     = 1
+}
+
+variable "max_node_count" {
+  description = "Maximum number of worker nodes"
+  type        = number
+  default     = 10
+}
+
+variable "instance_types" {
+  description = "EC2 instance types for worker nodes"
+  type        = list(string)
+  default     = ["m5.large", "m5.xlarge"]
+}