fix(tools.func): fix meilisearch import-dump background process handling

When killing the background meilisearch process after dump import,
bash would print a 'Terminated' job notification and trigger
'pop_var_context: head of shell_variables not a function context'
errors (visible as /dev/fd/63 line errors), causing the rest of
the update_script to not execute. This left meilisearch stopped
after migration and caused subsequent update runs to skip it
(binary version already matched latest).

Two fixes:
- Redirect background process output to /dev/null to suppress
  meilisearch startup log noise in the update output
- Add 'wait $MEILI_PID' after 'kill $MEILI_PID' so bash properly
  reaps the child process without printing a job status notification

Fixes #14276

misc/tools.func

@@ -7588,7 +7588,7 @@ function setup_meilisearch() {
 
           # Start meilisearch with --import-dump flag
           # This is a one-time import that happens during startup
-          /usr/bin/meilisearch --config-file-path /etc/meilisearch.toml --import-dump "$DUMP_FILE" &
+          /usr/bin/meilisearch --config-file-path /etc/meilisearch.toml --import-dump "$DUMP_FILE" >/dev/null 2>&1 &
           local MEILI_PID=$!
 
           # Wait for meilisearch to become healthy (import happens during startup)
@@ -7611,6 +7611,7 @@ function setup_meilisearch() {
 
           # Stop the manual process
           kill $MEILI_PID 2>/dev/null || true
+          wait $MEILI_PID 2>/dev/null || true
           sleep 2
 
           # Start via systemd for proper management