Process epoch X-headers in object read operations

[cthulhu-rider]

Relates #234.

[codecov]

Codecov Report

Merging #305 (d143b0f) into master (1d56e60) will increase coverage by 0.07%.
The diff coverage is 56.04%.

@@            Coverage Diff             @@
##           master     #305      +/-   ##
==========================================
+ Coverage   51.46%   51.53%   +0.07%     
==========================================
  Files         128      128              
  Lines        4640     4713      +73     
==========================================
+ Hits         2388     2429      +41     
- Misses       2050     2077      +27     
- Partials      202      207       +5     

Impacted Files	Coverage Δ
pkg/services/object/get/service.go	0.00% <0.00%> (ø)
pkg/services/object/get/util.go	17.91% <0.00%> (-0.28%)	⬇️
pkg/services/object/search/service.go	0.00% <0.00%> (ø)
pkg/services/object/search/util.go	32.35% <0.00%> (-0.99%)	⬇️
pkg/services/object_manager/placement/netmap.go	0.00% <0.00%> (ø)
pkg/services/object/get/exec.go	71.34% <42.85%> (-3.84%)	⬇️
pkg/services/object/search/exec.go	51.35% <42.85%> (-3.20%)	⬇️
pkg/services/object/search/container.go	71.79% <76.19%> (+0.96%)	⬆️
pkg/services/object/get/container.go	76.92% <85.00%> (+4.92%)	⬆️
pkg/services/object/get/prm.go	70.00% <0.00%> (+10.00%)	⬆️
... and 1 more

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