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/alb/README.md

@@ -64,6 +64,48 @@ The `target_group_arn` output is referenced by `ecs-service` as its
 - **WAF** — add `aws_wafv2_web_acl_association` for application-layer protection (SOC2 CC7.6, PCI-DSS 6.5, DORA ICT risk).
 - **Deregistration delay** — add `deregistration_delay` for graceful draining (SOC2 CC9.1 resilience).
 
+## 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: alb
+environment: dev
+inputs:
+  name: my-alb
+  subnets: subnet-aaa,subnet-bbb
+  security_group: sg-xxx
+  port: 80
+  protocol: HTTP
+  region: us-east-1
+```
+
+### Complex
+
+A production deployment with optional inputs:
+
+[`examples/complex.yaml`](examples/complex.yaml)
+```yaml
+# Complex ALB with HTTPS + ACM cert (requires a consumer-supplied domain)
+uses: acdl/pipelines/deploy.yaml@v1.6
+module: alb
+environment: dev
+inputs:
+  name: my-production-alb
+  subnets: subnet-aaa,subnet-bbb
+  security_group: sg-xxx
+  port: 443
+  protocol: HTTPS
+  region: us-east-1
+```
+
 ## Versioning
 
 `1.0.0` — interface MAJOR, behavior MINOR, lifecycle PATCH. MAJOR bumps