Added a check to ensure providersDelegationData is an array

[cfaur09]

Proposed Changes

• check if response from getDelegationProviders is array

How to test

• `/accounts/erd1qqqqqqqqqqqqqpgqa0fsfshnff4n76jhcye6k7uvd7qacsq42jpsp6shh2 -> should not return 500 internal server error

[github-actions]

k6 load testing comparison.
Base Commit Hash: 5c112f4
Target Commit Hash: 58e2c08

Metric	Base				Target				Diff
	Avg	Max	90	95	Avg	Max	90	95	Avg	Max	90	95
Transactions	68.66	5246.39	54.79	56.71	68.06	4513.81	55.32	56.99	-0.87% ✅	-13.96% ✅	+0.97% 🔴	+0.50% 🔴
Nodes	50.16	547.13	54.08	55.85	51.42	906.81	54.90	55.90	+2.51% 🔴	+65.74% 🔴	+1.53% 🔴	+0.10% 🔴
Mex	50.05	720.61	54.12	55.83	51.41	961.67	54.93	56.06	+2.72% 🔴	+33.45% 🔴	+1.49% 🔴	+0.42% 🔴
Pool	50.56	927.69	54.10	55.68	50.88	283.69	54.89	56.04	+0.63% 🔴	-69.42% ✅	+1.45% 🔴	+0.64% 🔴
Accounts	49.72	170.21	54.06	55.87	50.55	122.14	54.88	55.99	+1.66% 🔴	-28.24% ✅	+1.52% 🔴	+0.21% 🔴
Tokens	50.49	832.15	54.14	55.78	51.25	980.08	54.92	56.01	+1.50% 🔴	+17.78% 🔴	+1.44% 🔴	+0.41% 🔴
Blocks	57.08	1481.81	54.61	56.82	57.07	1146.10	55.26	57.11	-0.01% ✅	-22.66% ✅	+1.20% 🔴	+0.51% 🔴
Test Run Duration	60004.37				60004.30

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