Single-row sqlite tracking which topology the agent last applied and
its version hash. Sync/stdlib, same pattern as the log-forwarder
offset store. v1 is one-topology-per-agent; attempting to apply a
different topology over a populated row raises AlreadyApplied so the
endpoint can return 409. observed() snapshots live docker state
(decnet-topology-* bridges + decnet-* containers) for the heartbeat.
The store is a cache, not authority — no auto-restore on boot.
Master remains the only source of truth.
Step 3 of the agent <-> topology integration.
anti
aea3e7e05b