feat: send alert image with telegram message, if requested

[blenzi]

This PR adds the possibility to send the alert image together with a telegram message, if requested

• add boolean field send_image to recipient table
• add int field media_id to notification table
• add and use python-telegram-bot dependency (negligible increase in docker image size)

[ghost]

Nice of you to open a PR :pray: When you're ready and want to get it reviewed, post a comment in this Pull Request with this message: /quack review

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 92.59259% with 2 lines in your changes missing coverage. Please review.

Project coverage is 94.31%. Comparing base (767be30) to head (ecb101a). Report is 36 commits behind head on main.

Files with missing lines	Patch %	Lines
src/app/api/endpoints/media.py	33.33%	2 Missing :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #279      +/-   ##
==========================================
- Coverage   94.54%   94.31%   -0.23%     
==========================================
  Files          63       66       +3     
  Lines        1594     1690      +96     
==========================================
+ Hits         1507     1594      +87     
- Misses         87       96       +9     

Flag	Coverage Δ
client	90.58% <ø> (?)
unittests	94.51% <92.59%> (-0.03%)	:arrow_down:

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[frgfm]

Closing as this was for the legacy data model, feel free to reopen if I missed something!