Add iterate keys functionality to account service, controller and proxy forward

[cfaur09]

Reasoning

Proposed Changes

How to test

[github-actions]

k6 load testing comparison.
Base Commit Hash: 91f20cc
Target Commit Hash: 9f52b3c

Metric	Base				Target				Diff
	Avg	Max	90	95	Avg	Max	90	95	Avg	Max	90	95
Blocks	86.60	912.53	108.72	122.79	76.91	685.10	94.46	99.77	-11.18% ✅	-24.92% ✅	-13.12% ✅	-18.75% ✅
Nodes	62.14	1203.77	65.88	68.86	60.88	390.46	65.72	69.16	-2.02% ✅	-67.56% ✅	-0.25% ✅	+0.43% 🔴
Pool	61.96	1078.02	65.83	68.61	61.37	773.51	65.77	69.27	-0.96% ✅	-28.25% ✅	-0.09% ✅	+0.96% 🔴
Accounts	62.01	869.49	66.01	68.39	61.97	967.47	65.83	69.30	-0.06% ✅	+11.27% 🔴	-0.27% ✅	+1.33% 🔴
Transactions	92.53	2193.66	112.36	126.24	83.81	2457.34	93.13	97.68	-9.42% ✅	+12.02% 🔴	-17.12% ✅	-22.62% ✅
Tokens	60.77	199.93	65.80	68.86	61.44	791.32	65.75	69.40	+1.10% 🔴	+295.80% 🔴	-0.08% ✅	+0.79% 🔴
Mex	60.91	658.96	65.82	68.89	60.76	308.14	65.69	69.22	-0.25% ✅	-53.24% ✅	-0.19% ✅	+0.47% 🔴
Test Run Duration	60002.42				60001.64

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