chore: repo cleanup and prod sync tooling

- Remove stale deploy/docker-entrypoint.sh (Dockerfile copies root version)
- Remove scripts/seed.ts (superseded by seed.mjs)
- Add src/app/error.tsx and global-error.tsx (untracked error boundaries)
- Gitignore deploy/.prod/ for synced production configs
- Add scripts/sync-prod.ps1 to pull compose/env/Caddyfile from valhalla
- Add scripts/apply-compose.ps1 to push compose changes and restart services

deploy/docker-entrypoint.sh

@@ -1,11 +0,0 @@
-#!/bin/sh
-set -e
-
-if [ "${RUN_MIGRATIONS:-true}" = "true" ]; then
-  echo "running migrations..."
-  node /app/scripts/migrate.mjs
-else
-  echo "skipping migrations (RUN_MIGRATIONS=$RUN_MIGRATIONS)"
-fi
-
-exec node /app/server.js