fix(Replay): Normalize Project ID Typing To Int For Frontend

[cliffordxing]

EAP returns agg_project_id column as a float, which we eventually convert to a string in post_process.py:

ret_item["project_id"] = str(item["agg_project_id"])

Since agg_project_id is a float, the conversion to a string results in a ".0" trailling the ID, which results in an unknown project when passed to the frontend.

After asserting that the agg_project_id is indeed a float, this PR updates the normalization function to also convert the agg_project_id to an int first (to truncate the decimals) to account for the above issue.

Relates to: https://linear.app/getsentry/issue/REPLAY-824/create-query-function-for-replay-details

[linear]

REPLAY-824 Create Query Function For Replay Details

[codecov]

Codecov Report

❌ Patch coverage is 85.71429% with 1 line in your changes missing coverage. Please review.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
...y/replays/endpoints/organization_replay_details.py	85.71%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##           master   #104358       +/-   ##
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+ Coverage   66.03%    80.57%   +14.54%     
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  Files        9338      9347        +9     
  Lines      399132    399699      +567     
  Branches    25599     25599               
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+ Hits       263550    322067    +58517     
+ Misses     135129     77179    -57950     
  Partials      453       453