api results speed down from 1.5s to 0.4s

[owocki]

Description

This PR takes the explorer lazy load time from

kevinowocki@local /Users/kevinowocki/Sites/gitcoin/web~ % time curl "http://localhost:8000/api/v0.1/bounties/?bounty_owner_github_username=owocki&network=mainnet&idx_status=open&order_by=-featuring_date&offset=10&limit=5" > /dev/null
curl  > /dev/null  0.01s user 0.01s system 0% cpu 1.747 total

kevinowocki@local /Users/kevinowocki/Sites/gitcoin/web~ % time curl "http://localhost:8000/api/v0.1/bounties/slim/?bounty_owner_github_username=owocki&network=mainnet&idx_status=open&order_by=-featuring_date&offset=10&limit=5" > /dev/null
curl  > /dev/null  0.01s user 0.01s system 4% cpu 0.459 total

by creating a new route at http://localhost:8000/api/v0.1/bounties/slim/ that loads ONLY what is needed to load the /explorer results in a performant way.

(EDIT - re-added this) note that i had to cut the activities from the response because those were making the results way slow. luckily the activities were not really needed to render the result in the explorer. a further PR down the line could re-enable this by calling an API when the popover is triggered.

Refers/Fixes

#4538
#3628

Testing

Tested locally

[codecov]

Codecov Report

Merging #4550 into stable will increase coverage by 0.03%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           stable    #4550      +/-   ##
==========================================
+ Coverage   30.12%   30.15%   +0.03%     
==========================================
  Files         210      210              
  Lines       16938    16946       +8     
  Branches     2288     2288              
==========================================
+ Hits         5102     5110       +8     
  Misses      11638    11638              
  Partials      198      198

Impacted Files	Coverage Δ
app/dashboard/router.py	32.7% <100%> (+2.65%)	⬆️

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[owocki]

2e71b7f re-adds activities