fix(gen): check schema for some cases which lead to stack overflow

[tdakkota]

No description provided.

[codecov]

Codecov Report

Merging #306 (0be677a) into main (9baedb6) will increase coverage by 0.02%.
The diff coverage is 77.50%.

@@            Coverage Diff             @@
##             main     #306      +/-   ##
==========================================
+ Coverage   66.87%   66.90%   +0.02%     
==========================================
  Files         117      117              
  Lines        7874     7874              
==========================================
+ Hits         5266     5268       +2     
+ Misses       2256     2254       -2     
  Partials      352      352              

Impacted Files	Coverage Δ
tools/sgcollector/main.go	0.00% <0.00%> (ø)
gen/schema_gen_sum.go	82.70% <77.27%> (-0.09%)	⬇️
gen/schema_gen.go	79.04% <100.00%> (+0.82%)	⬆️
gen/reduce.go	65.71% <0.00%> (-8.58%)	⬇️
gen/ir/json.go	84.07% <0.00%> (+1.49%)	⬆️

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