Merge milestone/v1.14-refinement — v1.14 complete (NFR Refinement: bug fixes, security, stubs, tests, docs; 20 phases + final; tag v1.13.24)

v1.14 NFR Refinement milestone complete. 20 execution phases (P1-P20) +
1 final (P21). All P1/P2 backlog from v1.11 review resolved. Security
posture hardened (swallowed errors, account ID externalized, IAM scoped,
schema validation, credential hygiene). Stubs resolved (kyverno --kube-
version removed). 7 untested scripts gained coverage. Documentation
synced (ARCHITECTURE v1.11-v1.14 addenda, stale @v1.6-1.9 -> @v1.13,
GRILL G-005/G-008 resolved, COST.md window extended, D-083 deferral
recorded). Platform VPC parameterized.

561 tests pass (was 528 at v1.13.2; +33). 22/22 capabilities Verified.
6 grill binding decisions (G-101..G-106) applied. 1 escalation (E-001)
auto-resolved at full autonomy (D-101).

---ci---
project: acdl
phase: 21
milestone: v1.14
status: complete
---/ci---

terraform/platform/main.tf

@@ -29,6 +29,13 @@ provider "aws" {
   region = "us-east-1"
 }
 
+# v1.14 (REQ-154): VPC CIDR is parameterized (default 10.0.0.0/16).
+variable "vpc_cidr" {
+  description = "CIDR block for the shared platform VPC (default 10.0.0.0/16)."
+  type        = string
+  default     = "10.0.0.0/16"
+}
+
 # KMS customer-managed key for DynamoDB SSE + SSM Parameter Store encryption
 resource "aws_kms_key" "acdl_platform" {
   description             = "ACDL platform KMS key (DynamoDB SSE + SSM + Secrets Manager)"
@@ -252,7 +259,7 @@ output "acdl_sod_halt_topic_arn" {
 # ---------------------------------------------------------------------------
 
 resource "aws_vpc" "acdl_shared" {
-  cidr_block = "10.0.0.0/16"
+  cidr_block = var.vpc_cidr
   tags = {
     Name               = "acdl-shared"
     "acdl:owner"       = "acdl"
@@ -263,7 +270,7 @@ resource "aws_vpc" "acdl_shared" {
 }
 
 resource "aws_subnet" "acdl_shared" {
-  count             = 2
+  count             = length(data.aws_availability_zones.available.names)
   vpc_id            = aws_vpc.acdl_shared.id
   cidr_block        = cidrsubnet(aws_vpc.acdl_shared.cidr_block, 8, count.index + 1)
   availability_zone = data.aws_availability_zones.available.names[count.index]
@@ -317,6 +324,10 @@ resource "aws_security_group" "ecs" {
   description = "Security group for ECS Fargate services (platform VPC)"
   vpc_id      = aws_vpc.acdl_shared.id
 
+  # Ingress on port 80 is open to 0.0.0.0/0 — this is acceptable because
+  # the ECS service is fronted by a public-facing ALB (the ALB terminates
+  # TLS + routes to the target group). The ECS SG should not be attached
+  # directly to resources without an ALB in front. v1.14 (REQ-154).
   ingress {
     from_port   = 80
     to_port     = 80