Enrich notes loop (cloud)

The vault is synced to ~/vault by the environment setup. Run the enrich-notes-loop process against it, wrapped in a sync.

1. Pull the latest vault

cd ~/vault
ob sync-config --file-types image,audio,video,pdf,unsupported
ob sync

2. Enrich

Run enrich-notes-loop with ~/vault as the vault root. Enrich every note without enrichedAt, preserving existing note content.

3. Push results back