Harden upsert_version_meta RPC auth path

[riderx]

Summary (AI generated)

• Added migration supabase/migrations/20260227000000_harden_upsert_version_meta.sql to secure the public RPC.
• The updated upsert_version_meta flow now rejects anonymous/authenticated misuse, validates write authorization for the target app, and verifies p_version_id belongs to p_app_id.
• Existing insert behavior remains aligned with current expectations for positive/negative size bookkeeping and duplicate suppression.
• Granted execution only to service_role and revoked all execute rights from anon and authenticated.

Test plan (AI generated)

• Ran bun lint.
• Reviewed the PR diff with git diff origin/main...HEAD.

Screenshots (AI generated)

• Not applicable for backend migration change.

Checklist (AI generated)

• My code follows the code style of this project and passes bun run lint:backend && bun run lint.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• My change has adequate E2E test coverage.
• I have tested my code manually, and I have provided steps how to reproduce my tests.

Generated with AI

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📥 Commits

Reviewing files that changed from the base of the PR and between e719357 and 0ae4325.

📒 Files selected for processing (1)

• supabase/migrations/20260227000000_harden_upsert_version_meta.sql

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch riderx/fix-version-metrics

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud