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.

ct/dockge.sh

@@ -35,7 +35,7 @@ function update_script() {
 
   msg_warn "⚠️  ${APP} has been migrated to an addon script."
   echo ""
-  msg_info "This is a one-time migration. After this, you can update ${APP} anytime with:"
+  echo -e "${INFO}${YW}This is a one-time migration. After this, you can update ${APP} anytime with:${CL}"
   echo -e "${TAB}${TAB}${GN}update_dockge${CL}  or  ${GN}bash <(curl -fsSL ${ADDON_SCRIPT})${CL}"
   echo ""
   read -r -p "${TAB}Migrate update function now? [y/N]: " CONFIRM
@@ -60,7 +60,7 @@ MIGRATION_EOF
   ln -sf /usr/bin/update /usr/bin/update_dockge 2>/dev/null || true
   msg_ok "Migration complete"
 
-  msg_info "Running addon update"
+  echo -e "${INFO}${YW}Running addon update${CL}"
   type=update bash <(curl -fsSL "${ADDON_SCRIPT}")
   exit
 }