Fix: MCE validation error

[elic-eon]

🤔 Why?

Encounter MCE validation when processing the query log.

🤓 What?

The database and schema can not be empty strings or null so add a function to drop query logs that don't have schema

🧪 Tested?

So MCE error after the patch

☑️ Checks

• My PR contains actual code changes, and I have updated the version number in pyproject.toml.

[github-actions]

☂️ Python Coverage

current status: ✅

Overall Coverage

Lines	Covered	Coverage	Threshold	Status
11926	10621	89%	85%	🟢

New Files

File	Coverage	Status
metaphor/common/sql/utils.py	86%	🟢
TOTAL	86%	🟢

Modified Files

File	Coverage	Status
metaphor/postgresql/extractor.py	55%	🟢
TOTAL	55%	🟢

updated for commit: 47d82f0 by action🐍

[codecov]

Codecov Report

Attention: Patch coverage is 85.71429% with 2 lines in your changes missing coverage. Please review.

Project coverage is 89.05%. Comparing base (1dad53e) to head (47d82f0).

Files with missing lines	Patch %	Lines
metaphor/common/sql/utils.py	85.71%	1 Missing ⚠️
metaphor/postgresql/extractor.py	85.71%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #974      +/-   ##
==========================================
- Coverage   89.06%   89.05%   -0.01%     
==========================================
  Files         183      184       +1     
  Lines       11916    11926      +10     
==========================================
+ Hits        10613    10621       +8     
- Misses       1303     1305       +2     

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