Add Event JSON Schema

[ravindk89]

Summary

https://min.io/docs/minio/linux/administration/monitoring.html does not currently have an example of an event document.

S3 docs have an example, but we do have some diffs.

https://github.com/minio/minio/blob/master/internal/event/event.go#L64

{
    "eventVersion": "string",
    "eventSource": "string",
    "awsRegion": "string",
    "eventTime": "string",
    "eventName": "string",
    "userIdentity": {
        "principalId": "string"
    },
    "requestParameters": {
        "key": "value"
    },
    "responseElements": {
        "key": "value"
    },
    "s3": {
        "s3SchemaVersion": "string",
        "configurationId": "string",
        "bucket": {
            "name": "string",
            "ownerIdentity": {
                "principalId": "string"
            },
            "arn": "string"
        },
        "object": {
            "key": "string",
            "size": 10000,
            "eTag": "string",
            "contentType": "string",
            "userMetadata": {
                "key": "string"
            },
            "versionId": "string",
            "sequencer": "string"
        }
    },
    "source": {
        "host": "string",
        "port": "string",
        "userAgent": "string"
    }
}

This appears to be our overall schema. Some fields do not always populate, and some fields are general maps where I assume the values may vary (e.g. requestParameter, responseElements)

Goals

• Add the event schema to the relevant docs page

Non-Goals

Examples of how to use or utilize the returned document

Additional context

this was generated via customer request. Cherry-pick this to AIStor docs later.