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.

install/languagetool-install.sh

@@ -60,18 +60,16 @@ if [[ -n "$lang_code" ]]; then
     filename=$(curl -fsSL https://languagetool.org/download/ngram-data/ | grep -oP "ngrams-${lang_code}-[0-9]+\.zip" | sort -uV | tail -n1)
 
     if [[ -n "$filename" ]]; then
-      msg_info "Downloading $filename"
       download_file "https://languagetool.org/download/ngram-data/${filename}" "/tmp/${filename}"
 
       mkdir -p /opt/ngrams
-      msg_info "Extracting $lang_code ngrams to /opt/ngrams"
       unzip -q "/tmp/${filename}" -d /opt/ngrams
       rm "/tmp/${filename}"
 
       ngram_dir="/opt/ngrams"
       msg_ok "Installed $lang_code ngrams"
     else
-      msg_info "No ngram file found for ${lang_code}"
+      msg_warn "No ngram file found for ${lang_code}"
     fi
   else
     msg_error "Invalid language code: $lang_code"