kuralle-fs — persistent workspace via cf-agent (KuralleAgent DO)

A KuralleAgent Durable Object whose workspace is a SqlFileSystem over its own ctx.storage.sql. Files written in one request are read back in another — persistence through the cf-agent runtime on real Cloudflare infra.

curl -X POST "https://kuralle-fs-demo.mithushancj.workers.dev/fs/write" -H 'content-type: application/json' -d '{"path":"/kb/hours.md","content":"Open 9-5"}'
curl "https://kuralle-fs-demo.mithushancj.workers.dev/fs/read?path=/kb/hours.md"
curl "https://kuralle-fs-demo.mithushancj.workers.dev/fs/ls?path=/kb"