Paginated filtered pairs

[bogdan-rosianu]

Reasoning

• when fetching xExchange pairs, no pagination was used, resulting in heavy requests

Proposed Changes

• split the setting fetching in 2 parts: base settings and pairs. pairs queries now will use paginated requests

How to test

• <api>/mex/settins should return the same response

[github-actions]

k6 load testing comparison.
Base Commit Hash: 4d7881a
Target Commit Hash: 8e46377

Metric	Base				Target				Diff
	Avg	Max	90	95	Avg	Max	90	95	Avg	Max	90	95
Accounts	70.68	263.03	78.16	82.55	111.25	201.65	116.70	124.76	+57.41% 🔴	-23.34% ✅	+49.30% 🔴	+51.14% 🔴
Mex	36.66	789.80	40.90	43.31	55.67	487.68	58.92	61.17	+51.84% 🔴	-38.25% ✅	+44.07% 🔴	+41.22% 🔴
Pool	36.52	551.58	40.99	43.34	56.47	1164.48	58.79	61.07	+54.64% 🔴	+111.12% 🔴	+43.44% 🔴	+40.90% 🔴
Blocks	62.66	220.51	70.08	74.00	78.98	478.95	90.43	95.13	+26.04% 🔴	+117.21% 🔴	+29.03% 🔴	+28.54% 🔴
Transactions	70.87	282.66	77.63	84.67	111.58	743.04	117.44	122.67	+57.44% 🔴	+162.87% 🔴	+51.29% 🔴	+44.88% 🔴
Tokens	36.64	870.36	40.91	43.29	55.78	406.73	58.95	61.20	+52.24% 🔴	-53.27% ✅	+44.08% 🔴	+41.39% 🔴
Nodes	3654.53	11366.58	10519.26	11366.03	55.96	841.70	58.83	61.10	-98.47% ✅	-92.59% ✅	-99.44% ✅	-99.46% ✅
Test Run Duration	60002.47				60002.42

Legend: Avg - Average Response Time, Max - Maximum Response Time, 90 - 90th Percentile, 95 - 95th Percentile
All times are in milliseconds.