Docker compose update via SSH to abraham.jeena.net. Review examples
include real v2.x patches as auto and the v1→v2 migration as manual,
plus a synthetic v2→v3 breaking change example.
Also fix test_classifier.py version derivation for x.0.0 releases
where patch decrement would produce the same version, causing the
model to see a nonsensical "upgrading from 2.0.0 to 2.0.0" prompt.
