test: add Lambda event fixtures for API and cross-account handlers

Author: cristim

testdata/api-request-event.json

@@ -0,0 +1,14 @@
+{
+  "requestContext": {
+    "requestId": "test-request-id",
+    "http": {
+      "method": "GET",
+      "path": "/v1/info"
+    }
+  },
+  "headers": {
+    "accept": "application/json"
+  },
+  "rawPath": "/v1/info",
+  "rawQueryString": ""
+}

testdata/cross-account-event.json

@@ -0,0 +1,14 @@
+{
+  "account": "123456789012",
+  "region": "us-east-1",
+  "detail-type": "EC2 Instance State-change Notification",
+  "source": "aws.ec2",
+  "time": "2025-12-18T10:00:00Z",
+  "resources": [
+    "arn:aws:ec2:us-east-1:123456789012:instance/i-1234567890abcdef0"
+  ],
+  "detail": {
+    "instance-id": "i-1234567890abcdef0",
+    "state": "running"
+  }
+}