snowflake source info last updated missing [sc-29859]

[alyiwang]

🤔 Why?

get_ddl function in snowflake may throw SQL compilation error in some rare cases. This will cause all the table info for all the tables in the same batch to be lost.

🤓 What?

• split the get_ddl with get last update time, so at least they won't impact each other.

🧪 Tested?

tested against Metaphor instance

☑️ 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
13466	12053	90%	85%	🟢

New Files

No new covered files...

Modified Files

File	Coverage	Status
metaphor/snowflake/extractor.py	80%	🟢
TOTAL	80%	🟢

updated for commit: 6d3d132 by action🐍

[codecov]

Codecov Report

Attention: Patch coverage is 89.65517% with 3 lines in your changes missing coverage. Please review.

Project coverage is 89.50%. Comparing base (a42a0d6) to head (6d3d132).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
metaphor/snowflake/extractor.py	89.65%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1048      +/-   ##
==========================================
- Coverage   89.51%   89.50%   -0.01%     
==========================================
  Files         211      211              
  Lines       13448    13466      +18     
==========================================
+ Hits        12038    12053      +15     
- Misses       1410     1413       +3     

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