/// Initial backfill and backfill-resume logic.
/// Runtime configuration for the ingest cycle engine.
/// Enum dispatch for heterogeneous connector types.
/// Per-cycle ingest algorithm.
/// Rate-limit-aware HTTP client wrapping `reqwest`.
/// Deletion reconciliation.
/// Test helpers: `MockConnector` and document builders.
pub
/// Minute-resolution window planning for incremental sync.
/// Ingest worker: drives the cycle engine for a deployment.