feat: Easier troubleshooting with a Lambda that detects issues for you

[kichik]

Works like the status function. Can be executed directly, or exposed via HTTP. Sample output:

{
  "config": {
    "auth": "ok",
    "webhook": "ok",
    "secrets": "ok"
  },
  "summary": {
    "executions": {
      "total": 24,
      "succeeded": 18,
      "failed": 0,
      "aborted": 2,
      "timedOut": 0,
      "running": 4
    },
    "health": "healthy",
    "analysisWindow": "last 24 executions"
  },
  "issues": [
    {
      "severity": "warning",
      "category": "webhook-delivery",
      "title": "37/100 webhook deliveries failed (37%)",
      "description": "37 of the last 100 webhook deliveries from GitHub failed.",
      "suggestion": "Check the webhook handler Lambda logs for errors. Verify the webhook URL and secret are configured correctly.",
      "links": {
        "webhookHandlerLogs": "https://us-east-1.console.aws.amazon.com/cloudwatch/home?region=us-east-1#logsV2:log-groups/log-group/$252Faws$252Flambda$252Fgithub-runners-test-runnersWebhookHandlerwebhookha-sN5OLWXCeYN0"
      }
    },
    {
      "severity": "info",
      "category": "idle-reap",
      "title": "2 of 24 executions were idle-reaped",
      "description": "Runners were started but never picked up a job. Top repos: CloudSnorkel/cdk-github-runners (2)",
      "suggestion": "A small number of idle reaps is normal.",
      "links": {}
    }
  ],
  "deepLinks": {
    "stepFunction": "https://us-east-1.console.aws.amazon.com/states/home?region=us-east-1#/statemachines/view/arn:aws:states:us-east-1:123456789:stateMachine:runnersRunnerOrchestratorF9B66EBA-3FEK67lzq2U1",
    "webhookHandlerLogs": "https://us-east-1.console.aws.amazon.com/cloudwatch/home?region=us-east-1#logsV2:log-groups/log-group/$252Faws$252Flambda$252Fgithub-runners-test-runnersWebhookHandlerwebhookha-sN5OLWXCeYN0",
    "orchestratorLogs": "",
    "providerLogs": {
      "github-runners-test/CodeBuildx64": "https://us-east-1.console.aws.amazon.com/cloudwatch/home?region=us-east-1#logsV2:log-groups/log-group/github-runners-test-CodeBuildx64LogsA21ECD59-14edlCnV0dtl",
      // ...
    }
  }
}