replace match_direction -> is_positive_vote

[thelostone-mc]

Description

• Makes query faster shifting from Char to Boolean
• Updates all references from match_direction to is_positive_vote
• handle corner case when first contribution is negative in clr

[codecov]

Codecov Report

Merging #6272 into grants_round_5 will increase coverage by 0.32%.
The diff coverage is 16.66%.

@@                Coverage Diff                 @@
##           grants_round_5    #6272      +/-   ##
==================================================
+ Coverage           27.91%   28.23%   +0.32%     
==================================================
  Files                 278      278              
  Lines               26837    25626    -1211     
  Branches             4225     3769     -456     
==================================================
- Hits                 7491     7235     -256     
+ Misses              19015    18109     -906     
+ Partials              331      282      -49

Impacted Files	Coverage Δ
app/grants/views.py	15.68% <0%> (+0.02%)	⬆️
app/grants/models.py	48.34% <20%> (ø)	⬆️
app/grants/clr.py	14.94% <40%> (ø)	⬆️
app/dashboard/utils.py	42.23% <0%> (-2.1%)	⬇️
app/dashboard/views.py	11.33% <0%> (-1.77%)	⬇️
app/retail/emails.py	22.41% <0%> (-1.3%)	⬇️
...eting/management/commands/assemble_leaderboards.py	40.48% <0%> (ø)	⬆️
...rketing/management/commands/no_applicants_email.py	0% <0%> (ø)	⬆️
app/avatar/views_3d.py	9.59% <0%> (+0.53%)	⬆️
app/dashboard/embed.py	31.6% <0%> (+3.44%)	⬆️

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