feat(api): add EC2 Auto Scaling groups to the cloud explorer

Create groups from a launch template (in the default subnets unless given),
change their minimum, desired and maximum capacity, replace or remove an
instance, and follow the launches and terminations TheCloud's reconciler makes.
Deleting a group terminates its instances. Scaling policies are not offered:
the runtime stores them but its alarms only drive ECS scaling.

packages/api/src/cloudProxy.test.ts

@@ -2,7 +2,7 @@ import {describe, expect, test} from 'bun:test'
 import {createCloudAdapterRegistry} from './cloudProxy'
 import {checkChildCapabilities} from './cloud-spi/childCapabilities'
 import {isServiceType} from './cloud-spi/serviceCatalog'
-import type {CloudProvider, CloudServiceAdapter, CloudServiceType, CertificateActionName, DatabaseActionName, DistributionActionName, HttpApiActionName, KubernetesActionName, MonitoringActionName, ResourceActionName, UserPoolActionName} from './cloud-spi/types'
+import type {AutoScalingActionName, CloudProvider, CloudServiceAdapter, CloudServiceType, CertificateActionName, DatabaseActionName, DistributionActionName, HttpApiActionName, KubernetesActionName, MonitoringActionName, ResourceActionName, UserPoolActionName} from './cloud-spi/types'
 
 /**
  * Guards the schema-to-implementation contract for every registered adapter.
@@ -81,6 +81,11 @@ const METHOD_FOR_CERTIFICATE_ACTION: Record<CertificateActionName, keyof CloudSe
     revoke: 'revokeCertificate',
 }
 
+const METHOD_FOR_AUTO_SCALING_ACTION: Record<AutoScalingActionName, keyof CloudServiceAdapter> = {
+    setCapacity: 'setAutoScalingCapacity',
+    terminateInstance: 'terminateAutoScalingInstance',
+}
+
 const METHOD_FOR_USER_POOL_ACTION: Record<UserPoolActionName, keyof CloudServiceAdapter> = {
     updateUser: 'updateUserPoolUser',
     setUserGroups: 'setUserPoolUserGroups',
@@ -203,6 +208,15 @@ describe('registered adapters honour their schema', () => {
                 ).toBe('function')
             }
 
+            const autoScalingClaims = (adapter.schema().capabilities?.autoScalingActions ?? []).filter((capability) => capability.status === 'available')
+            for (const capability of autoScalingClaims) {
+                const method = METHOD_FOR_AUTO_SCALING_ACTION[capability.name]
+                expect(
+                    typeof adapter[method],
+                    `${label} advertises ${capability.name} as available but has no ${String(method)}()`,
+                ).toBe('function')
+            }
+
             const distributionClaims = (adapter.schema().capabilities?.distributionActions ?? []).filter((capability) => capability.status === 'available')
             for (const capability of distributionClaims) {
                 const method = METHOD_FOR_DISTRIBUTION_ACTION[capability.name]
@@ -225,6 +239,7 @@ describe('registered adapters honour their schema', () => {
                 ...(adapter.schema().capabilities?.kubernetesActions ?? []),
                 ...(adapter.schema().capabilities?.userPoolActions ?? []),
                 ...(adapter.schema().capabilities?.distributionActions ?? []),
+                ...(adapter.schema().capabilities?.autoScalingActions ?? []),
                 ...(adapter.schema().capabilities?.certificateActions ?? []),
                 ...(adapter.schema().capabilities?.monitoringActions ?? []),
                 ...(adapter.schema().capabilities?.httpApiActions ?? []),