feat: create sql generator file for data export

[adrianviquez]

The data export is going to need some SQL at the end of the day, as we can't just do a sql dump since we're doing specific models + data. You have to manually create that dump file by specifying your requirements, including which models you want to export data of, which fields within those models to exclude, etc.

https://linear.app/getsentry/issue/CCMRG-1994/create-sql-generator-file

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Note

Introduces a new sql_generator.py to produce additive, batched PostgreSQL INSERT ... ON CONFLICT statements for owner-scoped data exports.

• ExportContext prefetches hierarchy IDs and applies ownership/date filtering (with full exports for select models and hierarchy-based filtering for others)
• generate_upsert_sql builds batched UPSERTs per model using BATCH_SIZE, honoring composite conflict keys (e.g., core.Branch, timeseries.Measurement)
• Robust serialize_value handles enums, JSON, UUIDs, timestamps, bytea, and float/Decimal edge cases (NaN/Infinity)
• generate_full_export writes a complete SQL script with header, per-model batches, and BEGIN/COMMIT
• generate_sequence_resets appends sequence reset statements for auto-increment PKs; generate_timescale_export targets TIMESCALE_MODELS

^{Written by Cursor Bugbot for commit bdd8028. This will update automatically on new commits. Configure here.}

[sentry]

Codecov Report

❌ Patch coverage is 0% with 211 lines in your changes missing coverage. Please review.
✅ Project coverage is 93.36%. Comparing base (270978f) to head (bdd8028).
⚠️ Report is 4 commits behind head on main.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
...s/shared/shared/owner_data_export/sql_generator.py	0.00%	211 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #641      +/-   ##
==========================================
- Coverage   93.79%   93.36%   -0.44%     
==========================================
  Files        1291     1292       +1     
  Lines       46878    47119     +241     
  Branches     1517     1567      +50     
==========================================
+ Hits        43971    43992      +21     
- Misses       2598     2818     +220     
  Partials      309      309              

Flag	Coverage Δ
apiunit	96.56% <ø> (+<0.01%)	⬆️
sharedintegration	38.08% <0.00%> (-0.59%)	⬇️
sharedunit	87.12% <0.00%> (-1.34%)	⬇️
workerintegration	59.14% <ø> (-0.03%)	⬇️
workerunit	91.26% <ø> (-0.05%)	⬇️

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Codecov Report

❌ Patch coverage is 0% with 211 lines in your changes missing coverage. Please review.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
...s/shared/shared/owner_data_export/sql_generator.py	0.00%	211 Missing ⚠️

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[codspeed-hq]

Merging this PR will not alter performance

✅ 9 untouched benchmarks

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_{Comparing adrian/export-sql-generator (bdd8028) with main (270978f)¹}

Footnotes

1. No successful run was found on main (1aa11d2) during the generation of this report, so 270978f was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩