Silent crash on invalid regex patterns

[slackspace-io]

If an invalid regex pattern is defined on slackwatch.exclude/include there is a silent crash/failure without notifying user

[2024-07-27T19:52:05Z INFO  slackwatch::services::workloads] Exclude pattern: *tensor*
thread 'tokio-runtime-worker' panicked at src/services/workloads.rs:128:48:
called `Result::unwrap()` on an `Err` value: Syntax(
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
regex parse error:
    *tensor*
    ^
error: repetition operator missing expression
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
)
update_workload

Should notify in the UI that regex patterns were invalid.