High water mark test

[vershwal]

[!NOTE] Add comprehensive timing and progress logging to S3 storage uploads, including multipart, with chunk-sized stream reads.

• Backend (storage):
  • Instrumentation: Add detailed timing/progress logging in core/server/adapters/storage/S3Storage.ts for save, readFileInChunks, uploadMultipart, and saveRaw.
    • Logs durations, sizes, part/chunk counts, and outcomes for S3 commands (PutObject, CreateMultipartUpload, UploadPart, CompleteMultipartUpload, AbortMultipartUpload).
    • Configure fs.createReadStream with highWaterMark equal to multipart chunk size; track buffer concat/slice metrics.
    • Standardize log prefixes to [S3Storage] and add start/completion logs for operations.

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[coderabbitai[bot]]

Walkthrough

The pull request adds comprehensive runtime logging and timing instrumentation to the S3Storage.ts file across all major save and upload operations. Logging has been added to track execution flow and measure durations for save operations (both simple and multipart), file reading in chunks, multipart upload phases, and raw save operations. All log messages are standardized with a [S3Storage] prefix and contextual information. The existing control logic for choosing between multipart and simple uploads remains unchanged.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~12 minutes

• Verify consistency of [S3Storage] logging prefix across all new log statements
• Confirm timing measurements (start/end markers) are correctly paired in all code paths
• Ensure multipart and simple upload logging paths both capture appropriate metrics and events
• Check that no unintended changes were introduced to the upload decision logic or control flow
• Validate that error logging in abort scenarios includes updated messaging context

Pre-merge checks and finishing touches

❌ Failed checks (1 inconclusive)

Check name	Status	Explanation	Resolution
Title check	❓ Inconclusive	The title 'High water mark test' does not clearly summarize the main change; the PR primarily adds comprehensive S3 logging instrumentation, not testing.	Consider renaming the title to reflect the main change, such as 'Add comprehensive timing and progress logging to S3 storage uploads' for clarity.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description check	✅ Passed	The description is directly related to the changeset, providing detailed context about the logging and instrumentation changes to S3Storage.ts.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

✨ Finishing touches

• [ ] 📝 Generate docstrings

🧪 Generate unit tests (beta)

• [ ] Create PR with unit tests
• [ ] Post copyable unit tests in a comment
• [ ] Commit unit tests in branch highWaterMarkTest

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