// Package devices manages user devices (uuid, name, platform, last_seen) and
// owns subscription resolution for the rest of the API.
//
// Devices are registered implicitly on first connect (RegisterIfAbsent) and
// removed via DELETE /v1/me/devices/{id}. Removal hard-deletes the row, writes
// an audit_log entry, and triggers per-user data-plane credential recall
// through the CredentialRevoker interface (satisfied by nodes.Hub in module #5).
// Because the credential model is per-user (users.dp_uuid; the node side has no
// device dimension, doc/02 §3.2), "revoke a device" is realised as recalling
// the owning user's credential.
//
// SubscriptionMiddleware resolves the caller's highest-tier non-expired
// subscription (falling back to the free plan) and injects the plan
// {plan_code, expires_at, max_devices, daily_minutes, ad_gate} into the request
// context, where nodes (catalogue filtering / connect) and usage (daily caps)
// read it via PlanFromCtx. Plan numbers follow design/CLAUDE.md §7:
// free 1 / pro 5 / team 10 devices.
package devices
