[proxy] Do not fail after parquet upload error

[khanova]

Problem

If the parquet upload was unsuccessful, it will panic.

Summary of changes

Write error in logs instead.

Checklist before requesting a review

• I have performed a self-review of my code.
• If it is a core feature, I have added thorough tests.
• Do we need to implement analytics? if so did you add the relevant metrics to the dashboard?
• If this PR requires public announcement, mark it with /release-notes label and add several sentences in this section.

Checklist before merging

• Do not forget to reformat commit message to not include the above checklist

[conradludgate]

Looks good, but please fix up the postgres submodule changes

[github-actions]

3108 tests run: 2981 passed, 0 failed, 127 skipped (full report)

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Code coverage* (full report)

• functions: 31.4% (6450 of 20544 functions)
• lines: 48.3% (49868 of 103274 lines)

* collected from Rust tests only

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_{The comment gets automatically updated with the latest test results
46e4353 at 2024-05-23T09:52:26.984Z :recycle:}