v0.3.5

Demo UX polish — the three-beat story (status → push → status) now reads the same across the CLI printouts, the README example, and the gif.

Fixes

• Demo shell banner no longer tells users to "deploy from another terminal" — reframed for the current single-terminal flow.
• Tutorial on `demo start` shrunk from 8 commands across 4 sections to the 3 the gif actually demonstrates.
• Demo gif now runs `test_app` on the satellite instead of `cat`-ing its source, so viewers see deployed behavior change, not a one-character file diff.
• v2 test binary output now reads `test_app v2.0.0 (demo) — telemetry enabled` so the upgrade delta is visually unambiguous.
• Seeded v1 hash truncated to 8 chars — fixes a column-bleed bug in the first `status` call that broke table alignment.
• README example session replaced with real output from `satdeploy demo` (CSP transport, single test_app) instead of fabricated SSH output — docs and reality now match.