Added critical indexes to Message Store tables

[thehenrytsai]

• Added critical indexes to Message Store tables
• Changed boolean value -> string conversion to 0/1 instead to align with SQL design guidelines and have faster lookup
• Added limits to column lengths (required by MySQL for indexed columns)
• Removed obsolete columns in Message Store tables
• Added QoL launch.json for VSC for one-click debugging

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.06%. Comparing base (9864bea) to head (a07f6c0).

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #46      +/-   ##
==========================================
+ Coverage   87.69%   88.06%   +0.36%     
==========================================
  Files          12       12              
  Lines        1569     1617      +48     
  Branches      227      234       +7     
==========================================
+ Hits         1376     1424      +48     
  Misses        193      193              

[LiranCohen]

🥇 🥇 🥇 Clean!!!! And well documented 🙇