add infrastructure for logging

[skshetry]

export DATACHAIN_LOG_LEVEL="debug" DATACHAIN_LOG_OUTPUT=true DATACHAIN_LOG_EXTERNAL=fsspec,s3fs
python script.py

09:29:07 - s3fs - DEBUG - Setting up s3fs instance [4084/fsspecIO/Task-1]
09:29:07 - s3fs - DEBUG - RC: caching enabled? True (explicit option is True) [4084/fsspecIO/Task-1]
09:29:09 - s3fs - DEBUG - RC: Creating a new regional client for 'bucket' on the region 'us-east-1' [4084/fsspecIO/Task-1]
09:29:11 - s3fs - DEBUG - RC: Creating a new regional client for 'dvc-public' on the region 'us-east-2' [4084/fsspecIO/Task-8]
09:29:11 - s3fs - DEBUG - CALL: head_object - ({},) - {'Bucket': 'dvc-public', 'Key': 'data/dvcx/cats-and-dogs'} [4084/fsspecIO/Task-8]
09:29:12 - s3fs - DEBUG - Client error (maybe retryable): An error occurred (404) when calling the HeadObject operation: Not Found [4084/fsspecIO/Task-8]

[codecov]

Codecov Report

Attention: Patch coverage is 31.03448% with 20 lines in your changes missing coverage. Please review.

Project coverage is 87.28%. Comparing base (ce1b09a) to head (df0ec95).
Report is 7 commits behind head on main.

Files with missing lines	Patch %	Lines
src/datachain/logger.py	25.92%	18 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #841      +/-   ##
==========================================
- Coverage   87.42%   87.28%   -0.15%     
==========================================
  Files         128      129       +1     
  Lines       11424    11453      +29     
  Branches     1557     1564       +7     
==========================================
+ Hits         9988     9997       +9     
- Misses       1044     1062      +18     
- Partials      392      394       +2     

Flag	Coverage Δ
datachain	87.22% <31.03%> (-0.15%)	⬇️

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