Perf improvement: fortunes_ef, json

[pr-benchmarks]

Scenario	Environment	Date	Old RPS	New RPS	Change	Deviation	StDev	Dependencies
fortunes_ef [Fixed]	Fortunes EF 4- Trends Database Gold Windows	05/29/2025 23:26:40	147,229	261,329	77.50 % (114,100) 👍	3.45 σ	33,047.66	Changes Name Version Diff Microsoft.AspNetCore.Antiforgery.dll 10.0.0-preview.6.25277.113 -> 10.0.0-preview.6.25278.103 dotnet/dotnet@92f4458...0a01b39 Microsoft.AspNetCore.App 10.0.0-preview.6.25277.113 -> 10.0.0-preview.6.25278.103 92f4458...0a01b39 Microsoft.NETCore.App 10.0.0-preview.6.25277.113 -> 10.0.0-preview.6.25278.103 dotnet/runtime@92f4458...0a01b39
json [Fixed]	Json Crossgen2 1- Trends Intel Windows	05/29/2025 21:26:01	932,532	957,114	2.64 % (24,583) 👍	2.23 σ	11,012.90	Changes Name Version Diff Microsoft.AspNetCore.Antiforgery.dll 10.0.0-preview.6.25277.113 -> 10.0.0-preview.6.25278.103 dotnet/dotnet@92f4458...0a01b39 Microsoft.AspNetCore.App 10.0.0-preview.6.25277.113 -> 10.0.0-preview.6.25278.103 92f4458...0a01b39 Microsoft.NETCore.App 10.0.0-preview.6.25277.113 -> 10.0.0-preview.6.25278.103 dotnet/runtime@92f4458...0a01b39

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