feat(share/store): add eds store metrics

[walldiss]

Overview

I hate boilerplate, but I think it is reasonable here. If I generalise all operations right now, it will be huge pain later to modify specific ones later (like put metric is already different).

[codecov-commenter]

Codecov Report

Merging #2536 (bc6a05b) into main (d0e271e) will decrease coverage by 1.02%.
Report is 4 commits behind head on main.
The diff coverage is 35.74%.

@@            Coverage Diff             @@
##             main    #2536      +/-   ##
==========================================
- Coverage   52.62%   51.60%   -1.02%     
==========================================
  Files         156      157       +1     
  Lines       10007    10218     +211     
==========================================
+ Hits         5266     5273       +7     
- Misses       4275     4489     +214     
+ Partials      466      456      -10     

Files Changed	Coverage Δ
nodebuilder/share/opts.go	0.00% <0.00%> (ø)
share/eds/metrics.go	20.93% <20.93%> (ø)
share/eds/store.go	60.00% <60.39%> (-1.24%)	⬇️
nodebuilder/settings.go	46.90% <100.00%> (+0.95%)	⬆️

... and 9 files with indirect coverage changes