feat: EKS config rendering pipeline + Service Catalog template update

- Add eks_config.py with Pydantic models mirroring terraform-eks-deployment
- Add 8 Jinja2 templates (root.hcl, account.hcl, region.hcl, vpc.hcl,
  cluster.hcl, common-variables.hcl, default-versions.hcl, README.md)
- Add write_files_atomic() to github_provider.py using Git tree API
  for single-commit multi-file writes
- Update app.py with EKS detection (is_eks_deployment) and dual-path
  handler: EKS renders all 8 Terragrunt files atomically; legacy path
  writes single config.json
- Fix PascalCase→snake_case normalizer to handle acronyms (AWS, VPC)
  and compound words (FinOps) correctly
- Update product-template.yaml with all EKS parameters (ClusterName,
  AccountName, AWSAccountId, VpcName, VpcDomainName, etc.)
- Fix Pydantic v1 compatibility (class Config, .dict() instead of v2)"

service-catalog/product-template.yaml

@@ -1,36 +1,66 @@
 AWSTemplateFormatVersion: '2010-09-09'
-Description: 'Service Catalog Product: Create GitHub Repository from Template'
+Description: 'Service Catalog Product: Create EKS Cluster GitHub Repository from Template'
 
 Metadata:
   AWS::CloudFormation::Interface:
     ParameterGroups:
       - Label:
-          default: "Repository Configuration"
+          default: "Cluster Configuration"
         Parameters:
           - ProjectName
-          - OwningTeam
-      - Label:
-          default: "Environment Settings"
-        Parameters:
+          - ClusterName
           - Environment
           - AwsRegion
       - Label:
-          default: "Optional Metadata"
+          default: "Account Configuration"
         Parameters:
+          - AccountName
+          - AWSAccountId
+          - EnvironmentAbbr
+      - Label:
+          default: "VPC Configuration"
+        Parameters:
+          - VpcName
+          - VpcDomainName
+      - Label:
+          default: "Contact & Organization"
+        Parameters:
+          - OwningTeam
+          - ClusterMailingList
           - OrganizationPath
+      - Label:
+          default: "FinOps"
+        Parameters:
           - FinOpsProjectName
           - FinOpsProjectNumber
+      - Label:
+          default: "Optional Metadata"
+        Parameters:
           - AdditionalTags
 
     ParameterLabels:
       ProjectName:
         default: "Repository Name"
+      ClusterName:
+        default: "EKS Cluster Name"
       OwningTeam:
         default: "Owning Team"
       Environment:
         default: "Environment"
       AwsRegion:
         default: "AWS Region"
+      AccountName:
+        default: "AWS Account Name"
+      AWSAccountId:
+        default: "AWS Account ID"
+      EnvironmentAbbr:
+        default: "Environment Abbreviation"
+      VpcName:
+        default: "VPC Name"
+      VpcDomainName:
+        default: "VPC Domain Name"
+      ClusterMailingList:
+        default: "Cluster Mailing List"
       OrganizationPath:
         default: "Organization Path"
       FinOpsProjectName:
@@ -43,12 +73,21 @@ Metadata:
 Parameters:
   ProjectName:
     Type: String
-    Description: Name of the GitHub repository to create (lowercase, hyphens only)
+    Description: >-
+      Name of the GitHub repository to create (lowercase, hyphens only).
+      If ClusterName is left blank this also becomes the EKS cluster name.
     AllowedPattern: '^[a-z0-9][a-z0-9-]*[a-z0-9]$'
     ConstraintDescription: Must be lowercase letters, numbers, and hyphens only
     MinLength: 3
     MaxLength: 100
 
+  ClusterName:
+    Type: String
+    Description: >-
+      EKS cluster name. Defaults to ProjectName if left blank.
+    Default: ""
+    MaxLength: 63
+
   OwningTeam:
     Type: String
     Description: GitHub team that should have admin access to the repository
@@ -57,29 +96,63 @@ Parameters:
 
   Environment:
     Type: String
-    Description: Environment for this repository/project
-    Default: development
+    Description: Deployment environment
+    Default: dev
     AllowedValues:
-      - development
-      - staging
-      - production
-      - sandbox
+      - dev
+      - test
+      - prod
 
   AwsRegion:
     Type: String
-    Description: Primary AWS region for this project
+    Description: Primary AWS region for this EKS cluster
     Default: us-gov-west-1
     AllowedValues:
       - us-gov-west-1
       - us-gov-east-1
       - us-east-1
       - us-west-2
 
-  OrganizationPath:
+  AccountName:
+    Type: String
+    Description: "AWS account name (e.g., csvd-dev-ew)"
+    AllowedPattern: '^[a-z0-9-]+$'
+    ConstraintDescription: Must contain only lowercase letters, numbers, and hyphens
+
+  AWSAccountId:
+    Type: String
+    Description: "AWS Account ID (12 digits)"
+    AllowedPattern: '^\d{12}$'
+    ConstraintDescription: Must be a valid 12-digit AWS Account ID
+
+  EnvironmentAbbr:
+    Type: String
+    Description: "Environment abbreviation (e.g., dev, prod)"
+    AllowedPattern: '^[a-z]+$'
+    MaxLength: 10
+
+  VpcName:
+    Type: String
+    Description: "Name of the VPC for the cluster"
+    AllowedPattern: '^[a-z0-9-]+$'
+    ConstraintDescription: Must contain only lowercase letters, numbers, and hyphens
+
+  VpcDomainName:
+    Type: String
+    Description: "VPC domain name (e.g., dev.inf.csp1.census.gov)"
+    AllowedPattern: '^[a-z0-9.-]+$'
+    ConstraintDescription: Must be a valid domain name
+
+  ClusterMailingList:
     Type: String
-    Description: Organization path (e.g., dept:team:subteam)
+    Description: Email address for cluster notifications
     Default: ""
 
+  OrganizationPath:
+    Type: String
+    Description: "Organization path (e.g., census:ocio:csvd)"
+    Default: "census:ocio:csvd"
+
   FinOpsProjectName:
     Type: String
     Description: FinOps project name for cost allocation
@@ -92,7 +165,7 @@ Parameters:
 
   AdditionalTags:
     Type: String
-    Description: Additional tags as JSON object (e.g., {"key1":"value1","key2":"value2"})
+    Description: 'Additional tags as JSON object (e.g., {"key1":"value1"})'
     Default: "{}"
 
   # Hidden parameter - the Lambda ARN is passed in from the Service Catalog product definition
@@ -101,17 +174,38 @@ Parameters:
     Description: ARN of the Lambda function that creates repositories
     Default: "arn:aws-us-gov:lambda:us-gov-west-1:229685449397:function:service-catalog-repo-gen-template-automation"
 
+Conditions:
+  ClusterNameProvided: !Not
+    - !Equals
+      - !Ref ClusterName
+      - ""
+
 Resources:
   # Custom Resource that invokes the Lambda function
+  # NOTE: Property names use snake_case to match Pydantic model field names.
+  #       The Lambda normalizer converts PascalCase→snake_case but mishandles
+  #       acronyms (e.g. AWSAccountId → a_w_s_account_id), so we pass snake_case
+  #       directly to avoid ambiguity.
   RepositoryCreator:
     Type: Custom::GitHubRepository
     Properties:
       ServiceToken: !Ref LambdaFunctionArn
-      # These properties are passed to the Lambda function
+      # Core repo parameters
       project_name: !Ref ProjectName
       owning_team: !Ref OwningTeam
+      # EKS-specific parameters – these trigger the EKS rendering path in the Lambda
+      cluster_name: !If
+        - ClusterNameProvided
+        - !Ref ClusterName
+        - !Ref ProjectName
       environment: !Ref Environment
       aws_region: !Ref AwsRegion
+      account_name: !Ref AccountName
+      aws_account_id: !Ref AWSAccountId
+      environment_abbr: !Ref EnvironmentAbbr
+      vpc_name: !Ref VpcName
+      vpc_domain_name: !Ref VpcDomainName
+      cluster_mailing_list: !Ref ClusterMailingList
       organization_path: !Ref OrganizationPath
       finops_project_name: !Ref FinOpsProjectName
       finops_project_number: !Ref FinOpsProjectNumber
@@ -142,6 +236,15 @@ Outputs:
     Export:
       Name: !Sub '${AWS::StackName}-ConfigBranch'
 
+  ClusterName:
+    Description: EKS cluster name
+    Value: !If
+      - ClusterNameProvided
+      - !Ref ClusterName
+      - !Ref ProjectName
+
   Message:
     Description: Status message
-    Value: !Sub 'Successfully created repository ${ProjectName} and opened configuration pull request. Review and merge the PR to complete setup.'
+    Value: !Sub >-
+      Successfully created repository ${ProjectName} with EKS cluster
+      configuration. Review and merge the PR to complete setup.