feat: implement database setup, logging, and workflow management

- Added database configuration and migration setup using Knex.
- Implemented a logging system with Pino, including log persistence and flushing.
- Created a server runner with Fastify, integrating authentication and various API routes.
- Introduced a script sandbox for executing user-defined scripts with restricted access.
- Established initial workflows and scripts for manual and cron triggers.
- Included documentation for API endpoints and workflows.

packages/server/db.js

@@ -0,0 +1,11 @@
+import knex from "knex";
+import config from "./knexfile.js";
+
+export const db = knex(config);
+
+/**
+ * Apply pending migrations. Call once before registering workflows.
+ */
+export async function migrate() {
+  await db.migrate.latest();
+}