POST /api/v1/canary/tokens grows an optional topology_id field. When
present, the server hydrates the topology, validates the named decky is
in it, and resolves the docker container via
planter.resolve_topology_container — <name>-ssh if the decky exposes ssh,
else the topology base container. Absent ⇒ fleet semantics, unchanged.
The token row gets a nullable topology_id column (no migration helper
per pre-v1 policy). GET /api/v1/canary/tokens accepts ?topology_id= as
a filter. DELETE re-resolves the container at revoke time so a
redeployed topology is still reachable.
422 when the named decky isn't in the topology; 404 when the topology
itself doesn't exist.
