Fix connection exhaustion and closing of connections on errors

[inemtsev]

• I think I found the problem, there were many requests made against one connection, which would kill the server under high load.
• Claude also recommended closing connections on errors (doubt this was the problem, but why not).

@ShreckYe Can you please give blessings?

[github-actions]

The following frameworks were updated, pinging maintainers:
ktor: @ShreckYe

[joanhey]

Please add yourself to the maintainers in the benchmark_config.json.

So with any change or marked as broken, you will be notified.

Example:

FrameworkBenchmarks/frameworks/Java/quarkus/benchmark_config.json

Lines 1 to 6 in 33531b8

	{
	"framework": "quarkus",
	"maintainers": ["franz1981", "Sanne", "geoand"],
	"tests": [
	{
	"default": {