Cached discoveries from before the surface/fast-path/nested fixes still
counted as 'fresh' by the time-based window, so the panel showed worse
pre-fix data (what 'surely this isnt done?' surfaced on esphome).
Add servicediscovery.DiscoveryEngineVersion (currently 1), stamped onto
every freshly built discovery (LXC/VM and Docker build sites). Unlike
CLIAccessVersion it is NOT auto-upgraded on read, so a missing/older value
reliably means the result predates the current engine. The per-guest panel
shows an amber 're-run for improved results' nudge when engine version is
below current (CURRENT_DISCOVERY_ENGINE_VERSION, kept in sync).
Contract-neutral re: unified-resources (DiscoveryTab is a consumer; this is
a UI nudge + discovery field, no consumption-contract delta) — landed via
PULSE_ALLOW_CONTRACT_NEUTRAL_COMMIT. Go package + version-stamp test pass;
type-check + eslint clean.
rcourtman
c4523aaf11