Refactor account, NFT, and transaction services to improve caching

[cfaur09]

Reasoning

Proposed Changes

How to test

[github-actions]

k6 load testing comparison.
Base Commit Hash: 5f985ad
Target Commit Hash: 256c4e2

Metric	Base				Target				Diff
	Avg	Max	90	95	Avg	Max	90	95	Avg	Max	90	95
Mex	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	NaN% ✅	NaN% ✅	NaN% ✅	NaN% ✅
Blocks	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	NaN% ✅	NaN% ✅	NaN% ✅	NaN% ✅
Accounts	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	NaN% ✅	NaN% ✅	NaN% ✅	NaN% ✅
Tokens	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	NaN% ✅	NaN% ✅	NaN% ✅	NaN% ✅
Pool	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	NaN% ✅	NaN% ✅	NaN% ✅	NaN% ✅
Nodes	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	NaN% ✅	NaN% ✅	NaN% ✅	NaN% ✅
Transactions	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	NaN% ✅	NaN% ✅	NaN% ✅	NaN% ✅
Test Run Duration	60003.71				60003.10

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