Implement native fast iterative deploy workflow

deployment/native/install-user-units.sh

@@ -0,0 +1,49 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+scope="${1:-none}"
+repo_root="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
+unit_source_dir="$repo_root/deployment/native/systemd/user"
+unit_target_dir="${XDG_CONFIG_HOME:-$HOME/.config}/systemd/user"
+units=()
+
+case "$scope" in
+  none)
+    ;;
+  full)
+    units=(islandflow-web.service islandflow-api.service islandflow-compute.service islandflow-candles.service islandflow-ingest-options.service islandflow-ingest-equities.service)
+    ;;
+  web)
+    units=(islandflow-web.service)
+    ;;
+  api)
+    units=(islandflow-api.service)
+    ;;
+  services)
+    units=(islandflow-api.service islandflow-compute.service islandflow-candles.service islandflow-ingest-options.service islandflow-ingest-equities.service)
+    ;;
+  workers)
+    units=(islandflow-compute.service islandflow-candles.service islandflow-ingest-options.service islandflow-ingest-equities.service)
+    ;;
+  *)
+    echo "Unknown scope: $scope" >&2
+    echo "Expected one of: none, full, web, api, services, workers" >&2
+    exit 1
+    ;;
+esac
+
+mkdir -p "$unit_target_dir"
+cp "$unit_source_dir"/*.service "$unit_target_dir"/
+
+systemctl --user daemon-reload
+
+if [[ ${#units[@]} -gt 0 ]]; then
+  systemctl --user enable "${units[@]}"
+fi
+
+echo "Installed Islandflow user units into $unit_target_dir"
+if [[ ${#units[@]} -gt 0 ]]; then
+  echo "Enabled scope: $scope"
+else
+  echo "No units enabled yet. Pass a scope such as workers when you are ready."
+fi