feat(retrieval): add optional Qwen semantic layer

scripts/lib/semantic-retrieval.sh

@@ -0,0 +1,8 @@
+sync_semantic_retrieval() {
+  local root=$1 client=$2 home_path=$3 enabled=$4 dry_run=$5 update=$6
+  [ "$enabled" = true ] || [ -f "$home_path/.my-ai-configuration/semantic-retrieval.json" ] || return 0
+  local arguments=("$root/scripts/lib/semantic-retrieval.py" sync --root "$root" --home "$home_path" --client "$client" --enabled "$enabled")
+  [ "$dry_run" != true ] || arguments+=(--dry-run)
+  [ "$update" != true ] || arguments+=(--update)
+  python3 "${arguments[@]}"
+}