Fix column name for protocol in P&M query

[OussamaSaoudi-db]

This is a followup to this PR which patches a mistake in the filter. Protocol has a protocol.minReaderVersion, and no protocol.min_reader_version field.

This PR also fixes an intermittent test failure caused by repeat initialization of tracing. This PR changes the test_scan_data test to instead use the test_log crate for initializing logs.

[zachschuermann]

good catch thanks

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 74.03%. Comparing base (1a66fb9) to head (e0ba49a).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
kernel/src/scan/mod.rs	0.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #343      +/-   ##
==========================================
- Coverage   74.08%   74.03%   -0.06%     
==========================================
  Files          43       43              
  Lines        8154     8137      -17     
  Branches     8154     8137      -17     
==========================================
- Hits         6041     6024      -17     
  Misses       1733     1733              
  Partials      380      380              

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