Proxy Lifecycle

Proxy entries should move through a bounded lifecycle:

1. Source metadata defines where proxy candidates come from.
2. Fetchers download and parse source payloads.
3. Validators check protocol behavior and latency.
4. Storage keeps accepted entries and metadata.
5. Strategies select proxies for requests.
6. Circuit breakers and health checks remove unhealthy entries from hot paths.

The generated Proxy Sources page shows the active source catalog.