Add support for trimming lobs

[lovetodream]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.55%. Comparing base (51c790d) to head (1d32db7).

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #49      +/-   ##
==========================================
+ Coverage   80.49%   80.55%   +0.05%     
==========================================
  Files         128      128              
  Lines       14861    14895      +34     
==========================================
+ Hits        11963    11999      +36     
+ Misses       2898     2896       -2     

Files	Coverage Δ
Sources/OracleNIO/Data/LOB.swift	64.02% <100.00%> (+3.88%)	⬆️
Sources/OracleNIO/OracleChannelHandler.swift	86.17% <100.00%> (ø)
Tests/IntegrationTests/LOBTests.swift	100.00% <100.00%> (ø)
...ctionStateMachine/StatementStateMachineTests.swift	100.00% <ø> (ø)

... and 2 files with indirect coverage changes