OpenVault hardware, revision A

This is a placeholder post so the journal and the hero's "Latest" line have something real to point at. Replace it with the actual story of revision A.

Things worth covering in the real version:

• What revision A is for: proving the core of the design, not being the final device.
• What's published: schematics, board files, BOM. What isn't yet: firmware.
• Connectivity: offline by default, with optional Bluetooth LE.
• What's already known to be wrong and what changes in revision B.

Short is fine. A hundred words and a photograph per revision is plenty.