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/tinyauth-install.sh

@@ -23,7 +23,7 @@ setup_deb_based() {
   fetch_and_deploy_gh_release "tinyauth" "steveiliop56/tinyauth" "singlefile" "latest" "/opt/tinyauth" "tinyauth-$(arch_resolve)"
 
   msg_info "Setting up Tinyauth"
-  PASS=$(openssl rand -base64 8 | tr -dc 'a-zA-Z0-9' | head -c 8)
+  PASS=$(random_password 8)
   USER=$(htpasswd -Bbn "tinyauth" "${PASS}")
   cat <<EOF >/opt/tinyauth/credentials.txt
 Tinyauth Credentials
@@ -67,7 +67,7 @@ setup_alpine() {
   fetch_and_deploy_gh_release "tinyauth" "tinyauthapp/tinyauth" "singlefile" "latest" "/opt/tinyauth" "tinyauth-$(arch_resolve)"
 
   msg_info "Configuring Tinyauth"
-  PASS=$(openssl rand -base64 8 | tr -dc 'a-zA-Z0-9' | head -c 8)
+  PASS=$(random_password 8)
   USER=$(htpasswd -Bbn "tinyauth" "${PASS}")
 
   cat <<EOF >/opt/tinyauth/credentials.txt