KIP-53 — Add custom policies for reconnect attempts to NetworkdClient

Discussion Client

KIP-53 adds a pluggable `ReconnectAttemptPolicy` interface (a factory for per-broker `ReconnectAttemptScheduler` instances) to `NetworkClient`, replacing the static `reconnect.backoff.ms` delay with customizable reconnect schedules such as exponential backoff. This allows operators to reduce connection storm pressure on brokers during prolonged outages and enables advanced patterns like active/passive cluster failover.

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