chore(scripts): add constrained install helper

Author: Sakeeb91

scripts/install_with_constraints.sh

@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+ROOT_DIR="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")/.." && pwd)"
+
+cd "$ROOT_DIR"
+
+if [[ ! -f "constraints.txt" ]]; then
+  echo "constraints.txt not found; aborting." >&2
+  exit 1
+fi
+
+pip install -r requirements.txt -c constraints.txt
+