[BACKEND] Initialize Go backend structure and dependencies (#23)

scripts/db-bootstrap.sh

@@ -0,0 +1,61 @@
+#!/bin/bash
+# ============================================
+# Chat Switchboard - Database Bootstrap
+# ============================================
+# Idempotent: safe to run on every CI build.
+# Creates the app role and database if they
+# don't exist. Runs as the Postgres superuser.
+#
+# Required env vars:
+#   PGHOST, PGPORT, PGUSER, PGPASSWORD  — admin connection
+#   APP_USER, APP_PASSWORD               — app-level credentials
+#   DB_NAME                              — target database name
+# ============================================
+
+set -euo pipefail
+
+echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
+echo "Database bootstrap: ${DB_NAME}"
+echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
+
+# ── 1. Create role if not exists ─────────────
+ROLE_EXISTS=$(psql -tAc "SELECT 1 FROM pg_roles WHERE rolname = '${APP_USER}';" postgres)
+
+if [[ "${ROLE_EXISTS}" == "1" ]]; then
+    echo "✓ Role '${APP_USER}' already exists"
+    # Update password in case it changed
+    psql -c "ALTER ROLE ${APP_USER} WITH PASSWORD '${APP_PASSWORD}';" postgres
+    echo "✓ Password synced"
+else
+    psql -c "CREATE ROLE ${APP_USER} WITH LOGIN PASSWORD '${APP_PASSWORD}';" postgres
+    echo "✓ Role '${APP_USER}' created"
+fi
+
+# ── 2. Create database if not exists ─────────
+DB_EXISTS=$(psql -tAc "SELECT 1 FROM pg_database WHERE datname = '${DB_NAME}';" postgres)
+
+if [[ "${DB_EXISTS}" == "1" ]]; then
+    echo "✓ Database '${DB_NAME}' already exists"
+else
+    psql -c "CREATE DATABASE ${DB_NAME} OWNER ${APP_USER};" postgres
+    echo "✓ Database '${DB_NAME}' created"
+fi
+
+# ── 3. Ensure extensions (requires superuser) ─
+psql -d "${DB_NAME}" <<'SQL'
+CREATE EXTENSION IF NOT EXISTS "uuid-ossp";
+CREATE EXTENSION IF NOT EXISTS "pgcrypto";
+CREATE EXTENSION IF NOT EXISTS "vector";
+SQL
+echo "✓ Extensions verified (uuid-ossp, pgcrypto)"
+
+# ── 4. Grant privileges ─────────────────────
+psql -d "${DB_NAME}" -c "GRANT ALL PRIVILEGES ON DATABASE ${DB_NAME} TO ${APP_USER};"
+psql -d "${DB_NAME}" -c "GRANT ALL PRIVILEGES ON SCHEMA public TO ${APP_USER};"
+psql -d "${DB_NAME}" -c "ALTER DEFAULT PRIVILEGES IN SCHEMA public GRANT ALL ON TABLES TO ${APP_USER};"
+psql -d "${DB_NAME}" -c "ALTER DEFAULT PRIVILEGES IN SCHEMA public GRANT ALL ON SEQUENCES TO ${APP_USER};"
+echo "✓ Privileges granted"
+
+echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
+echo "Bootstrap complete: ${DB_NAME}"
+echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"