chore(prisma): enforce frontend-owned schema rollout policy

scripts/prisma-sync.sh

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+CANONICAL_SCHEMA="$ROOT_DIR/frontend/prisma/schema.prisma"
+TARGETS=(
+  "$ROOT_DIR/omni_chat/prisma/schema.prisma"
+  "$ROOT_DIR/omni_outbound/prisma/schema.prisma"
+)
+
+if [[ ! -f "$CANONICAL_SCHEMA" ]]; then
+  echo "[prisma-sync] Canonical schema not found: $CANONICAL_SCHEMA" >&2
+  exit 1
+fi
+
+for target in "${TARGETS[@]}"; do
+  mkdir -p "$(dirname "$target")"
+  cp "$CANONICAL_SCHEMA" "$target"
+  echo "[prisma-sync] Updated $target"
+done
+
+echo "[prisma-sync] Done. Canonical source: $CANONICAL_SCHEMA"