Hi there, how do I configure a Slack Webhook automation to include the last line of output from any failed tasks? In Prefect 1 we had slack notifications such as:

Failed

Propagate Affinity merges / deletions is now in a Failed state

Message

Copy code

AssertionError('Some items failed to merge')

Now the best I can get is:

<flow> in state

Failed

Flow run <flow>/fiery-hyrax observed in state

Failed

at 2023-06-23T190401.492402+00:00.

Flow run URL: https://app.prefect.cloud/.../

State message: 1/1 states failed.

from the config:

# Subject
{{ flow.name }} in state `{{ flow_run.state.name }}`

# Body
Flow run {{ flow.name }}/{{ flow_run.name }} observed in state `{{ flow_run.state.name }}` at {{ flow_run.state.timestamp }}.
Flow run URL: {{ flow_run|ui_url }}
State message: {{ flow_run.state.message }}

Is it possible to improve upon the "State message" part as this is not very informative? Or is this not available in the variables that can be accessed from this context. If that's the case how would we include this information if we built something to send a notification on failure ourselves?