feat(sgcollector): refactor reporters, add stats flag

[tdakkota]

No description provided.

[codecov]

Codecov Report

Merging #201 (28b8806) into main (6b9723c) will decrease coverage by 0.42%.
The diff coverage is 4.10%.

@@            Coverage Diff             @@
##             main     #201      +/-   ##
==========================================
- Coverage   67.08%   66.66%   -0.43%     
==========================================
  Files         100      101       +1     
  Lines        6453     6506      +53     
==========================================
+ Hits         4329     4337       +8     
- Misses       1853     1899      +46     
+ Partials      271      270       -1     

Impacted Files	Coverage Δ
gen/tstorage.go	61.73% <ø> (+2.60%)	⬆️
tools/sgcollector/api.go	0.00% <0.00%> (ø)
tools/sgcollector/main.go	0.00% <0.00%> (ø)
tools/sgcollector/report.go	0.00% <0.00%> (ø)
tools/sgcollector/stage.go	0.00% <0.00%> (ø)
tools/sgcollector/worker.go	0.00% <0.00%> (ø)
gen/errors.go	66.66% <38.46%> (-15.95%)	⬇️
gen/generator.go	60.60% <50.00%> (ø)
... and 1 more

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