0.03  2026-05-21
    - Multi-host failover and connection Pool (circuit breaker, hedged
      queries, fan-out, sessions); async DNS; TLS mutual auth.
    - retry, wait_mutation, native external tables, idempotent and
      async/aggregated insert, Streamer backpressure.
    - More introspection helpers, the EV::ClickHouse::Error class, and
      new types (BFloat16, Decimal256, Interval, Geo, JSON).
    - Reliability and memory-safety fixes; docs and tests.

0.02  2026-04-30
    - Bug fixes: keepalive PING/PONG routing; last_error_code reports
      top-level code; IPv6 URI literals; skip_pending teardown.
    - HTTP arrayref insert() croaks on nested refs.
    - POD rewrite; expanded t/, xt/, eg/.

0.01  2026-03-15
    - Initial release.
    - HTTP (8123) + native (9000, rev 54459) protocols.
    - TLS via OpenSSL; LZ4 native compression; gzip HTTP compression.
    - URI parsing; per-query + connection settings; parameterized
      queries; auto-reconnect; drain / cancel / skip_pending.
    - Native types: Int8..256, UInt8..256, Float32/64, Bool, String,
      FixedString, Date/Date32/DateTime/DateTime64 (with tz),
      Decimal32/64/128, Enum8/16, UUID, IPv4/6, Nullable, Array,
      Tuple, Map, LowCardinality, SimpleAggregateFunction, Nested,
      Nothing.
    - Accessors: column_names, column_types, last_error_code,
      last_totals, last_extremes, profile_rows / bytes /
      rows_before_limit, server_info / version / timezone,
      is_connected, pending_count.