feat(P27): add Examples section to every module README (D-058)

Each module README (10 primitives + 2 patterns) now has a ## Examples
section before ## Versioning, referencing and excerpting the validated
simple.yaml + complex.yaml (+ mysql.yaml for RDS) example contracts. The
RDS README includes a Multi-engine variation subsection (D-059).

---ci---
project: acdl
phase: 27
milestone: v1.7
status: execute
---/ci---

modules/l1/ecs-service/README.md

@@ -71,6 +71,47 @@ provided.
 - **Deployment circuit breaker** — add `deployment_circuit_breaker` block for resilience (SOC2 CC9.1, DORA operational resilience).
 - **Health check** — add a `health_check` block to the target group (currently missing despite the contract schema having a healthcheck field).
 
+## Examples
+
+Validated example contracts are in [`examples/`](examples/). The platform-test
+pipeline validates them against `schemas/contract.schema.json`.
+
+### Simple
+
+A minimal deployment:
+
+[`examples/simple.yaml`](examples/simple.yaml)
+```yaml
+uses: acdl/pipelines/deploy.yaml@v1.6
+module: ecs-service
+environment: dev
+inputs:
+  name: my-service
+  region: us-east-1
+  image: public.ecr.aws/docker/library/nginx:latest
+  port: 80
+```
+
+### Complex
+
+A production deployment with optional inputs:
+
+[`examples/complex.yaml`](examples/complex.yaml)
+```yaml
+# Complex ECS service with env vars + health check
+uses: acdl/pipelines/deploy.yaml@v1.6
+module: ecs-service
+environment: dev
+inputs:
+  name: my-production-service
+  region: us-east-1
+  image: public.ecr.aws/docker/library/nginx:latest
+  port: 8080
+  env:
+    LOG_LEVEL: info
+    ENVIRONMENT: production
+```
+
 ## Versioning
 
 `1.0.0` — interface MAJOR, behavior MINOR, lifecycle PATCH. MAJOR bumps