Reader always has the data array with full size, regardless of the number of agents being read with the "headers" keyword

[gvidigal-psr]

When reading a file using PSRI.OpenBinary.Reader and the keywords use_header = true and headers, the data has the original size of all file agents.

e.g.:
agents = ["x", "y", "z"]
data = [1, 2, 3]
headers = ["x", y"]

expected value for reader.data: [1, 2]
actual value: [1, 2, 0]

julia> versioninfo()
Julia Version 1.9.3
Commit bed2cd540a (2023-08-24 14:43 UTC)
Build Info:
  Official https://julialang.org/ release
Platform Info:
  OS: Windows (x86_64-w64-mingw32)
  CPU: 8 × Intel(R) Core(TM) i7-8550U CPU @ 1.80GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-14.0.6 (ORCJIT, skylake)
  Threads: 1 on 8 virtual cores

(PSRClassesInterface) pkg> st PSRClassesInterface
Project PSRClassesInterface v0.11.0
No Matches in `D:\Repositorios\PSRClassesInterface.jl\Project.toml`