proxmox-install: show download progress bar for the bundle fetch

-fsSL suppresses all output during the ~30 MB download, which
leaves the operator staring at 'fetching bundle...' for up to a
minute on a cold registry. Drop -s and add --progress-bar so there
is a live indicator; keep -fL so we still fail on HTTP errors and
follow redirects. Print the downloaded size alongside 'extracting'
for quick sanity-checking.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

deploy/proxmox-install.sh

@@ -39,9 +39,14 @@ tmp="$(mktemp -d)"
 trap 'rm -rf "${tmp}"' EXIT
 
 echo "==> fetching bundle (${VETTING_VERSION}) from ${BUNDLE_URL}"
-curl -fsSL "${BUNDLE_URL}" -o "${tmp}/vetting-bundle.tar.gz"
+# --progress-bar (not -s) so the operator sees a live indicator —
+# bundles are ~30 MB and the registry can be slow on a cold run, and
+# a silent 5 s has tricked us into Ctrl-C'ing mid-download before.
+# -f keeps fail-on-HTTP-error; -L still follows redirects.
+curl -fL --progress-bar "${BUNDLE_URL}" -o "${tmp}/vetting-bundle.tar.gz"
 
-echo "==> extracting"
+bundle_size="$(du -h "${tmp}/vetting-bundle.tar.gz" | cut -f1)"
+echo "==> extracting (${bundle_size})"
 tar -C "${tmp}" -xzf "${tmp}/vetting-bundle.tar.gz"
 
 # Bundle extracts to vetting-bundle-<sha>/; glob-match the single