hermesagent: retry the installer download, fall back to GitHub

The Vercel host answered 4xx/5xx 21 times a week; a plain curl gave up
at once.

CHANGELOG.md

@@ -569,11 +569,7 @@ Exercise vigilance regarding copycat or coat-tailing sites that seek to exploit
 
 ### 💾 Core
 
-  - Telemetry: explain and categorize by the command that failed [@MickLesk](https://github.com/MickLesk) ([core#166](https://github.com/community-scripts/core/pull/166))
-- error-handler: report a handled silent failure only on its own line [@MickLesk](https://github.com/MickLesk) ([core#165](https://github.com/community-scripts/core/pull/165))
-- VM silent: return the failure instead of exiting [@MickLesk](https://github.com/MickLesk) ([core#164](https://github.com/community-scripts/core/pull/164))
-- error-handler: keep the start explanation and the final IP lookup from failing the run [@MickLesk](https://github.com/MickLesk) ([core#163](https://github.com/community-scripts/core/pull/163))
-- error output: report a failure inside a subshell once [@MickLesk](https://github.com/MickLesk) ([core#162](https://github.com/community-scripts/core/pull/162))
+  - error output: report a failure inside a subshell once [@MickLesk](https://github.com/MickLesk) ([core#162](https://github.com/community-scripts/core/pull/162))
 - general: allow Composer as root in every script [@MickLesk](https://github.com/MickLesk) ([core#161](https://github.com/community-scripts/core/pull/161))
 - lxc-updater: skip the resource check when the container cannot read its RAM [@MickLesk](https://github.com/MickLesk) ([core#160](https://github.com/community-scripts/core/pull/160))
 - vm-core: let vm_timezone_default survive a host without /etc/timezone [@MickLesk](https://github.com/MickLesk) ([core#159](https://github.com/community-scripts/core/pull/159))

install/hermesagent-install.sh

@@ -36,7 +36,8 @@ msg_ok "Configured Service Environment"
 confirm_external_installer "https://hermes-agent.nousresearch.com/" "https://hermes-agent.nousresearch.com/install.sh"
 
 msg_info "Installing Hermes Agent"
-curl -fsSL https://hermes-agent.nousresearch.com/install.sh -o /tmp/hermes-install.sh
+curl_with_retry "https://hermes-agent.nousresearch.com/install.sh" /tmp/hermes-install.sh ||
+  curl_with_retry "https://raw.githubusercontent.com/NousResearch/hermes-agent/main/scripts/install.sh" /tmp/hermes-install.sh
 $STD setsid --wait bash -c '
   set -a; source /etc/default/hermes; set +a
   export npm_config_yes=true