fix(caddy): remove extra path in the admin caddy routes

[darkweak]

Closes #631

[netlify]

✅ Deploy Preview for teal-sprinkles-4c7f14 canceled.

Name	Link
🔨 Latest commit	238ae6b
🔍 Latest deploy log	https://app.netlify.com/projects/teal-sprinkles-4c7f14/deploys/6839e2bb6402a100087568a4

[github-actions]

2025-05-30T17:05:56.158Z-iPad_Pro_landscape.jpeg

• https://github.com/darkweak/souin/releases/download/cache-test-result-pre-release/2025-05-30T17.05.56.158Z-iPad_Pro_landscape.jpeg

[mohammed90]

This will likely cause issues with other modules that add to the admin API. It's not namespaced, so the souin API endpoint ends up being a catch-all for all requests. Running this config:

{
	cache {
		api {
			debug
			prometheus
			souin
		}
	}
	debug
}
localhost {
	route {
		cache
		reverse_proxy localhost:8080
	}
}

http://localhost:8080 {
	respond "hi"
}

I get this response for API requests unrelated to souin:

$ curl http://localhost:2019/test/
{"error":"resource not found: /test/"}

Which is coming from here:

souin/plugins/caddy/admin.go

Lines 47 to 51 in 516ed8c

	return caddy.APIError{
	HTTPStatus: http.StatusNotFound,
	Err: fmt.Errorf("resource not found: %v", request.URL.Path),
	}
	}

[mohammed90]

@darkweak, I think this is critical because it may be an unintended side-effect