v0.7.0 — Store Search & Validator Upgrade

Two new additions to Meridian this release:

Store Search — Find any seller by store name or slug. The new /stores page has live search that shows reputation scores, tier badges, and sales counts. Access it from the "Stores" link in the navbar.

Validator Upgrade — The network monitor now connects directly to the XRPL mainnet cluster via WebSocket instead of routing through a server-side proxy. Faster, more stable, and works for every visitor.