fix(codec): full codec fix race condition

[shadowspore]

No description provided.

[codecov]

Codecov Report

Merging #325 (3bf28ef) into main (49234a0) will decrease coverage by 0.36%.
The diff coverage is 50.00%.

@@            Coverage Diff             @@
##             main     #325      +/-   ##
==========================================
- Coverage   68.91%   68.55%   -0.37%     
==========================================
  Files         294      294              
  Lines        9275     9273       -2     
==========================================
- Hits         6392     6357      -35     
- Misses       2281     2309      +28     
- Partials      602      607       +5     

Impacted Files	Coverage Δ
internal/proto/codec/full.go	68.88% <50.00%> (-1.33%)	⬇️
internal/mtproto/rpc.go	40.54% <0.00%> (-24.33%)	⬇️
internal/rpc/options.go	90.00% <0.00%> (-10.00%)	⬇️
internal/pool/pool.go	59.12% <0.00%> (-9.49%)	⬇️
internal/rpc/engine.go	72.00% <0.00%> (-6.41%)	⬇️
internal/mtproto/read.go	50.53% <0.00%> (-2.16%)	⬇️

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