Websocket subscriptions improvements

[stefangutica]

Reasoning

Proposed Changes

How to test

[github-actions]

k6 load testing comparison.
Base Commit Hash: 8733370
Target Commit Hash: bc04011

Metric	Base				Target				Diff
	Avg	Max	90	95	Avg	Max	90	95	Avg	Max	90	95
Mex	33.86	364.99	43.87	52.05	25.98	695.31	41.93	58.01	-23.30% ✅	+90.50% 🔴	-4.41% ✅	+11.45% 🔴
Accounts	108.54	372.32	260.70	269.67	148.24	666.18	253.94	266.12	+36.58% 🔴	+78.93% 🔴	-2.60% ✅	-1.32% ✅
Pool	34.09	567.00	43.95	52.08	26.06	910.87	41.82	57.71	-23.55% ✅	+60.65% 🔴	-4.86% ✅	+10.81% 🔴
Blocks	43.51	904.86	55.67	61.58	37.34	1172.30	66.14	94.55	-14.18% ✅	+29.56% 🔴	+18.80% 🔴	+53.52% 🔴
Tokens	33.80	217.48	43.91	52.09	35.94	18683.41	37.98	45.89	+6.32% 🔴	+8490.94% 🔴	-13.52% ✅	-11.90% ✅
Nodes	66.35	13974.43	53.46	56.98	293.82	11942.02	177.16	209.11	+342.81% 🔴	-14.54% ✅	+231.39% 🔴	+267.01% 🔴
Transactions	96.01	21657.49	83.11	92.30	124.33	18700.72	97.13	119.07	+29.50% 🔴	-13.65% ✅	+16.87% 🔴	+29.00% 🔴
Test Run Duration	60002.75				60001.71

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