refactor(worker): Inject repository service into ReportService and optimize commit query

[sentry]

Fixes WORKER-VHG. The issue was that: Repeated GithubAppInstallation queries due to lazy-loaded relationships and uncached get_repo_provider_service calls.

• Modified ReportService to accept an optional TorngitBaseAdapter instance as repository_service in its constructor.
• Updated ReportService's get_existing_report_for_carryforward method to utilize the injected repository_service if provided, falling back to get_repo_provider_service otherwise.
• Enhanced the preprocess_upload_task to eagerly load Repository, Owner, and GithubAppInstallation data when fetching a Commit object, reducing N+1 queries.
• Passed the pre-fetched repository_service to the ReportService constructor within preprocess_upload_task.

This fix was generated by Seer in Sentry, triggered by Tom Hu. 👁️ Run ID: 12511267

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Note

Medium Risk
Touches the report carryforward initialization path and how provider diffs are fetched, so regressions could affect carryforward line shifting. Also changes ORM loading behavior in the preprocess task, which is low-risk but could surface relationship/loading assumptions.

Overview
Reduces repeated git-provider and DB lookups during preprocess by injecting a pre-created TorngitBaseAdapter into ReportService and reusing it when shifting carryforward reports (falling back to get_repo_provider_service only if not provided).

Optimizes preprocess_upload by eager-loading Commit.repository -> Repository.author -> Owner.github_app_installations via joinedload, then passing the fetched repository_service into ReportService to avoid N+1/lazy-load queries during report initialization.

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[sentry]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.25%. Comparing base (13ff78c) to head (06d6205).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #788   +/-   ##
=======================================
  Coverage   92.25%   92.25%           
=======================================
  Files        1305     1305           
  Lines       47981    47985    +4     
  Branches     1636     1636           
=======================================
+ Hits        44263    44267    +4     
  Misses       3407     3407           
  Partials      311      311           

Flag	Coverage Δ
workerintegration	58.57% <100.00%> (+0.01%)	⬆️
workerunit	90.38% <100.00%> (+<0.01%)	⬆️

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ All tests successful. No failed tests found.

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