feat(P03): l2-energy-analytics-api manifest (T-3.3)

---ci---
phase: 3
milestone: v1.0
status: execute
persona: infra-stub-engineer
task: T-3.3
requirements:
  covered: [REQ-04, REQ-05]
---/ci---

Wave 1, task T-3.3. Creates modules/l2/l2-energy-analytics-api/manifest.yaml composing
5 L1s by name (D-020). All referenced L1 names exist in modules/l1/.

modules/l2/l2-energy-analytics-api/manifest.yaml

@@ -0,0 +1,27 @@
+name: l2-energy-analytics-api
+kind: l2
+description: Historical energy analytics query API
+l1s:
+  - name: l1-eks-fargate
+    inputs:
+      cluster_name: analytics-cluster
+      region: us-east-1
+      cpu_arch: arm64
+  - name: l1-api-gateway
+    inputs:
+      api_name: energy-analytics-api
+      stage_name: dev
+  - name: l1-lambda
+    inputs:
+      function_name: analytics-query
+      runtime: python3.11
+      handler: index.handler
+  - name: l1-s3
+    inputs:
+      bucket_name: acdl-analytics-data
+      region: us-east-1
+      retention_days: "2555"
+  - name: l1-cloudwatch
+    inputs:
+      log_group_name: /acdl/analytics-api
+      metric_namespace: acdl/analytics