Add file count, total size, and per-file size validation

Email notification when daily free limit is reached

Add daily free question limit for unauthenticated users

Consolidate format_stats into single function

Security: auth on trace endpoints, pin litellm, sanitize errors

Security hardening: server-side sessions, timing-safe tokens

Add BASE_PROMPT: self-contained responses, no speculation

Redact user document content from traces before upload

Fix upload endpoint: accept JSON payload, add logging

Simplify explorer to pure API backend

Use head= for JS injection instead of js= parameter

Inject JS via gr.Blocks(js=) instead of inline script tags

Embed shared CSS/JS inline instead of file serving

Allow static directory for Gradio file serving

Fix file upload: use Gradio upload endpoint for actual file transfer

Rewrite explorer with Docker SDK, streaming, citations, custom UI

Add HF trace storage, admin controls, and Spaces deployment

Add trace viewer accordion back

Initial document-explorer product