fix: Handle case where setting metadata is None

[WillDaSilva]

Before:

$ meltano config meltano set state_backend.uri file:///${MELTANO_ROOT_DIR}/.meltano/state
Need help fixing this problem? Visit http://melta.no/ for troubleshooting steps, or to
join our friendly Slack community.

'NoneType' object has no attribute 'is_redacted'

After:

$ meltano config meltano set state_backend.uri file:///${MELTANO_ROOT_DIR}/.meltano/state
Meltano setting 'state_backend.uri' was set in `meltano.yml`: 'file:////.meltano/state'

Instead of setting the non-existent setting, would we rather it error cleanly?

Closes #6937

[netlify]

✅ Deploy Preview for meltano canceled.

Name	Link
🔨 Latest commit	b85de92
🔍 Latest deploy log	https://app.netlify.com/sites/meltano/deploys/635abac0fa34a900084a9a5b

[tayloramurphy]

@WillDaSilva is the actual problem here that when you do a config for a setting that doesn't exist it gives this error? Looks like this is coming up because EDK things can use the config block however they want technically, right?

[WillDaSilva]

is the actual problem here that when you do a config for a setting that doesn't exist it gives this error?

@tayloramurphy Yes. Whether or not we want to permit setting these settings is unknown to me, but we definitely shouldn't be erroring in this way.

I asked in the PR description:

Instead of setting the non-existent setting, would we rather it error cleanly?

If we do want it to error cleanly, I can update this PR to do so.

[tayloramurphy]

If we do want it to error cleanly, I can update this PR to do so.

@WillDaSilva I'd say have it execute but give a warning that "this setting is not known to Meltano".

[WillDaSilva]

I'd say have it execute but give a warning that "this setting is not known to Meltano".

There's a nice parallel between that approach and what we do when a setting that does not exist is retrieved, which is emit a warning and return None.

[codecov]

Codecov Report

Merging #6938 (b85de92) into main (b830890) will decrease coverage by 0.02%.
The diff coverage is 87.50%.

@@            Coverage Diff             @@
##             main    #6938      +/-   ##
==========================================
- Coverage   88.75%   88.73%   -0.03%     
==========================================
  Files         284      284              
  Lines       20548    20542       -6     
  Branches     2028     2027       -1     
==========================================
- Hits        18237    18227      -10     
- Misses       1976     1979       +3     
- Partials      335      336       +1     

Impacted Files	Coverage Δ
src/meltano/cli/interactive/config.py	30.36% <71.42%> (+0.73%)	⬆️
src/meltano/core/settings_service.py	97.43% <100.00%> (-0.09%)	⬇️
src/meltano/cli/utils.py	82.74% <0.00%> (-1.06%)	⬇️
src/meltano/core/plugin_discovery_service.py	88.75% <0.00%> (-0.60%)	⬇️

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more