Report Azure CLI repo write errors

Author: Copilot

scripts/install.sh

@@ -320,7 +320,13 @@ configure_azure_cli_rpm_repo() {
         log_info "Replacing existing Azure CLI dnf package source: $AZURE_CLI_RPM_REPO_PATH"
     fi
 
-    if ! cat > "$AZURE_CLI_RPM_REPO_PATH" << 'EOF'
+    local repo_write_error
+    repo_write_error=$(mktemp) || {
+        log_error "Failed to create temporary file for Azure CLI repo write errors"
+        return 1
+    }
+
+    if ! cat 2> "$repo_write_error" > "$AZURE_CLI_RPM_REPO_PATH" << 'EOF'
 [azure-cli]
 name=Azure CLI
 baseurl=https://packages.microsoft.com/yumrepos/azure-cli
@@ -329,9 +335,18 @@ gpgcheck=1
 gpgkey=https://packages.microsoft.com/keys/microsoft.asc
 EOF
     then
-        log_error "Failed to write Azure CLI dnf package source: $AZURE_CLI_RPM_REPO_PATH"
+        local reason
+        reason=$(< "$repo_write_error")
+        rm -f "$repo_write_error"
+        if [[ -n "$reason" ]]; then
+            log_error "Failed to write Azure CLI dnf package source $AZURE_CLI_RPM_REPO_PATH: $reason"
+        else
+            log_error "Failed to write Azure CLI dnf package source: $AZURE_CLI_RPM_REPO_PATH"
+        fi
         return 1
     fi
+
+    rm -f "$repo_write_error"
 }
 
 install_azure_cli_rpm() {