Standardize generate.sh: dotnet tool install + curl --fail

Simplify tool install to just `dotnet tool install --global` (works
whether already installed or not). Add --fail --silent --show-error
to curl invocations so the script aborts on HTTP errors.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: HavenDV

src/libs/Descript/generate.sh

@@ -3,7 +3,7 @@ set -euo pipefail
 
 dotnet tool install --global autosdk.cli --prerelease
 rm -rf Generated
-curl -o openapi.yaml https://docs.descriptapi.com/openapi.yaml
+curl --fail --silent --show-error -o openapi.yaml https://docs.descriptapi.com/openapi.yaml
 
 # Add top-level security array
 yq -i '.security = [{"bearerAuth": []}]' openapi.yaml