refactor: using tracing to carry context and log

[kezhuw]

Closes #38.

[codecov]

Codecov Report

Attention: Patch coverage is 91.89189% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 84.97%. Comparing base (82d25e5) to head (545713a).

Files	Patch %	Lines
src/session/connection.rs	80.00%	2 Missing ⚠️
src/session/mod.rs	96.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #40      +/-   ##
==========================================
- Coverage   85.23%   84.97%   -0.26%     
==========================================
  Files          34       34              
  Lines        4848     4799      -49     
==========================================
- Hits         4132     4078      -54     
- Misses        716      721       +5     

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