Migrations 065/068 have always created servers.management_mode and
servers.allow_agent_update_observed, but the model fields,
MANAGEMENT_MODES, is_managed, and agent_registry.observed_blocked_count
were lost in the 2026-07 data loss — POST /management-mode and
GET /observed-status raised AttributeError, and a mode flip that got
past validation would land on a transient Python attribute and
evaporate. test_survey_api carried skip-stubs documenting the hole.
Restored: the two columns (specs mirror the migrations), the mode
constant and is_managed property, to_dict emission, and a minimal
observed-block counter on the registry. The four skip-stubs are now
real tests, including one proving the flip persists across sessions.
The dispatch-level Observe guard remains hollow and is tracked in
plan 82 §H. events_json on notification_preferences is likewise
re-mapped (column carried by migration 059; its resolution surface is
still lost) so pre-loss override data survives.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
