ci: add deployment of unstable version

[dkharms]

Description

Whenever new PR gets merged to main branch we deploy unstable (or latest) version of seq-db to our servers with set up benchmarking infrastructure.

---

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 71.05%. Comparing base (727a5b3) to head (1852fbf).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #309      +/-   ##
==========================================
+ Coverage   71.04%   71.05%   +0.01%     
==========================================
  Files         201      201              
  Lines       14773    14773              
==========================================
+ Hits        10495    10497       +2     
+ Misses       3530     3529       -1     
+ Partials      748      747       -1     

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