Update channel scanning

[nikodemas]

Hi @amotl,

I am making a new PR on the same topic of #82.

• Add channel scanning by name as mentioned in Update notification channel scanning #163
• Fix exceptions when non-existent channel uid is used

Let me know if you have any advice/comments

[codecov]

Codecov Report

Attention: Patch coverage is 5.55556% with 17 lines in your changes missing coverage. Please review.

Project coverage is 85.01%. Comparing base (f310bb3) to head (302747c).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
grafana_wtf/core.py	6.25%	15 Missing ⚠️
grafana_wtf/commands.py	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #171      +/-   ##
==========================================
- Coverage   86.23%   85.01%   -1.22%     
==========================================
  Files           9        9              
  Lines        1104     1121      +17     
==========================================
+ Hits          952      953       +1     
- Misses        152      168      +16     

Flag	Coverage Δ
unittests	85.01% <5.55%> (-1.22%)	⬇️

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[amotl]

Thanks a stack. 💯

[amotl]

We just released grafana-wtf 0.22.0, including your improvements. Thank you again!