Refactor/core qol adoption (#17655)

* Scripts: close every msg_info block with msg_ok

Past-tense msg_info calls that should have been msg_ok, notices that opened a block before a prompt, and blocks without a closing msg_ok. These already left a stale spinner; with core's block stack they would resume it after every later msg_ok.

* Generate passwords with random_password

openssl rand -base64 | tr -dc | head -c returned fewer characters than asked for, and the unfiltered | cut variants put / and + into passwords that end up in DSNs and sed expressions. Secrets an app decodes as base64 are unchanged. Requires community-scripts/core#61.

* Keep data directories through CLEAN_INSTALL instead of copying them

create_backup copied uploads, storage and similar directories twice per update and needed their size again in free space. CLEAN_INSTALL_KEEP moves them aside instead. Only directories the upstream release does not ship, in scripts that restored right after the fetch. Requires community-scripts/core#61.

* Drop the 300s uv timeout overrides

setup_uv exports UV_HTTP_TIMEOUT=600 now; the scripts' 300 only lowered it. Requires community-scripts/core#61.

tools/pve/update-apps.sh

@@ -654,12 +654,11 @@ for container in $CHOICE; do
       log_write "Container $container ($service): FAILED — no backup found for restore"
       exit 235
     fi
-    msg_info "Restoring from: $BACKUP_ENTRY"
     pct restore $container "$BACKUP_ENTRY" --storage $LXC_STORAGE --force >/dev/null 2>&1
     restorestatus=$?
     if [ $restorestatus -eq 0 ]; then
       pct start $container
-      msg_ok "Container $container successfully restored from backup"
+      msg_ok "Container $container restored from ${BACKUP_ENTRY}"
       log_result "$container" "$service" "RESTORED" "Update failed (exit $exit_code) — restored from backup"
       log_write "Container $container ($service): RESTORED from $BACKUP_ENTRY"
     else