Hugo Nijhuis
c757bb76f3
Add config structs with sensible defaults for tunable parameters: - JetStreamConfig for stream retention (1 year) and replica count (1) - HashRingConfig for virtual nodes per physical node (150) - ShardConfig for shard count (1024) and replication factor (1) Each component gets a new WithConfig constructor that accepts custom configuration, while the original constructors continue to work with defaults. Zero values in configs fall back to defaults for backward compatibility. Closes #38 Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>