Troubleshooting support for Keptn-service (aka. Integration)

Success Criteria: Support for troubleshooting errors in Keptn-services (aka. Integrations)

Motivation

Pain: A Keptn user does not get any information about errors that happened in a Keptn-service (aka. Integration)
Target: Keptn provides basic support to list errors that occurred in a Keptn-service.
Driver: Improve the experience for working with Keptn-services.

Type of Errors: In a Keptn-service, two types of errors can occur: (1) task-related and (2) not-task-related once.

Task-related: When executing a specific task, an error occurs. This already results in a xyz.finished event with status errored.
Non-task-related: For example, the Keptn-service can not start, or an API endpoint can`t be reached. This functionality is not related to the execution of a task.

--> Regardless of the context in which the error happened, I want to get informed about the error in the Keptn Bridge.

User flow in Bridge:

Open the Uniform of a project
All Keptn-services (Integrations) that are connected to the Control Plane and subscribed to this project are listed.
An indicator in the column Status tells me that a service has problems: see errored in red;
When clicking on the service, the last 10 errors that happened in this Keptn-service are listed.
- An error is displayed by a red icon, the timestamp, and the error message.
- By default, just the first line of the error message is shown. When clicking on it, I get the entire message.
A show older Errors loads the next 10 errors.