Add Doris Schoolhouse and clean pending homelab changes

home/doris-schoolhouse/bin/apply-postgres-schema.sh

@@ -0,0 +1,24 @@
+#!/usr/bin/env bash
+set -euo pipefail
+cd "$(dirname "$0")/.."
+SCHEMA_FILE="app/db/schema.sql"
+if [ ! -f "$SCHEMA_FILE" ]; then
+  echo "schema file missing: $SCHEMA_FILE" >&2
+  exit 1
+fi
+
+if [ -n "${DATABASE_URL:-}" ] && command -v python3 >/dev/null 2>&1; then
+  export PYTHONPATH=.
+  python3 app/scripts/apply_schema.py
+  exit $?
+fi
+
+cat >&2 <<'MSG'
+Cannot apply schema automatically.
+Requirements:
+- DATABASE_URL must be set
+- python3 must be available
+- psycopg must be installed for direct apply
+Alternative: run the SQL in app/db/schema.sql manually against the schoolhouse database.
+MSG
+exit 1