fix: dia-1287: single kafka producer for app

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Commit https://github.com/HumanSignal/infra/commit/df3f68b29a4781a46338950a37e40bec9effe249 is created.

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Codecov Report

Attention: Patch coverage is 9.09091% with 30 lines in your changes missing coverage. Please review.

Project coverage is 57.31%. Comparing base (bc69ce6) to head (877855a).
Report is 11 commits behind head on master.

Files	Patch %	Lines
server/app.py	6.66%	28 Missing ⚠️
server/handlers/result_handlers.py	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #160      +/-   ##
==========================================
- Coverage   57.75%   57.31%   -0.45%     
==========================================
  Files          40       41       +1     
  Lines        1754     1778      +24     
==========================================
+ Hits         1013     1019       +6     
- Misses        741      759      +18     

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Commit https://github.com/HumanSignal/infra/commit/54590f9e86cf0a39f4b3fbb4f282aa933d9d9bfb is created.

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Commit https://github.com/HumanSignal/infra/commit/a4f9e9b9de4dc537fe888d93c608b4828a3972f8 is created.

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Commit https://github.com/HumanSignal/infra/commit/eabf4466b8176607a42fe30ad998792664f986e7 is created.

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Commit https://github.com/HumanSignal/infra/commit/aed494c9126795a1ddf65420d7e907b59cf820ac is created.