[MEX-333] pair fees collector

[claudiulataretu]

Reasoning

• add missing pair information

Proposed Changes

• add fees collector address from pair
• add fees collector cut percentage

How to test

query Pairs {
	pairs(offset: 0, limit: 100) {
		address
		feesCollector {address}
		feesCollectorCutPercentage
	}
}

• query should return values for pairs with fees collector enabled and null otherwise

[codecov]

Codecov Report

Patch coverage: 26.31% and project coverage change: -0.08 ⚠️

Comparison is base (87bbf9b) 56.42% compared to head (377c989) 56.35%.

Additional details and impacted files

@@                   Coverage Diff                    @@
##           feat/admin-endpoints    #1112      +/-   ##
========================================================
- Coverage                 56.42%   56.35%   -0.08%     
========================================================
  Files                       233      233              
  Lines                      7691     7710      +19     
  Branches                    515      517       +2     
========================================================
+ Hits                       4340     4345       +5     
- Misses                     2911     2923      +12     
- Partials                    440      442       +2     

Flag	Coverage Δ
unittests	56.35% <26.31%> (-0.08%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/modules/pair/services/pair.abi.service.ts	16.66% <12.50%> (-0.31%)	⬇️
src/modules/pair/models/pair.model.ts	94.73% <100.00%> (+0.29%)	⬆️

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