Reshape the sync-providers seam before Komoot (web-login) and Apple
Health (device) adapters land. Captures the decisions in three ADRs,
seeds CONTEXT.md with Connected Services vocabulary, and proposes the
OpenSpec change covering schema rename + ConnectedServiceManager +
capability seams (Importer / RoutePusher / WebhookReceiver).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
