feat(preprod): Add Git commit field

[trevor-e]

Adds a new commit column with a foreign key to the commits table. This will track which commit was used to build the PreprodArtifact uploaded to Sentry. Writing to this column will come later.

[github-actions]

This PR has a migration; here is the generated SQL for src/sentry/preprod/migrations/0005_add_git_commit.py

for 0005_add_git_commit in preprod

--
-- Add field commit to preprodartifact
--
ALTER TABLE "sentry_preprodartifact" ADD COLUMN "commit_id" bigint NULL;
ALTER TABLE "sentry_preprodartifact" ADD CONSTRAINT "sentry_preprodartifact_commit_id_97171e7d_fk_sentry_commit_id" FOREIGN KEY ("commit_id") REFERENCES "sentry_commit" ("id") DEFERRABLE INITIALLY DEFERRED NOT VALID;
ALTER TABLE "sentry_preprodartifact" VALIDATE CONSTRAINT "sentry_preprodartifact_commit_id_97171e7d_fk_sentry_commit_id";
CREATE INDEX CONCURRENTLY "sentry_preprodartifact_commit_id_97171e7d" ON "sentry_preprodartifact" ("commit_id");

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #93651      +/-   ##
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+ Coverage   83.10%   88.02%   +4.91%     
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  Files       10326    10327       +1     
  Lines      595663   595673      +10     
  Branches    23137    23137              
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+ Hits       495050   524321   +29271     
+ Misses     100120    70859   -29261     
  Partials      493      493