[Redis 8.10]Add MAXCOUNT and MAXSIZE options to XREAD and XREADGROUP

[uglide]

Redis 8.10 adds cumulative reply caps to the stream read commands: MAXCOUNT limits the total number of entries returned across all streams (unlike COUNT, which is per stream), and MAXSIZE applies a soft cap in bytes to the serialized reply.

Expose both as optional XReadArgs settings (maxCount/maxSize) with Builder entry points. When unset, the keywords are omitted from the wire. Response shape, blocking, and consumer-group semantics are unchanged; server-side validation errors propagate as-is.

Covered by wire-encoding unit tests and integration tests (cumulative cap across streams, oversized-first-entry MAXSIZE rule, no-message reply preservation, pending-entry accounting, error propagation), gated on Redis 8.10.

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Note

Low Risk
Additive optional arguments on existing stream read APIs with no client-side parsing changes; behavior depends on Redis 8.10+ when the options are used.

Overview
Adds Redis 8.10 cumulative reply limits for stream reads via optional maxCount and maxSize on XReadArgs (including Builder helpers). When set, build() emits MAXCOUNT and MAXSIZE on the wire for both XREAD and XREADGROUP; unset values stay omitted so older servers are unaffected.

MAXCOUNT caps total entries across all streams (unlike per-stream COUNT). MAXSIZE is a soft byte budget on the serialized reply. Response parsing and client semantics are unchanged; invalid combinations surface as normal Redis errors.

Coverage includes RESP encoding unit tests and integration tests (multi-stream cap, soft MAXSIZE, empty reads, group pending counts, validation), gated on Redis 8.10+.

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[ggivo]

LGTM

Before merge need to sync since version

[ggivo]

Sync on the actual version to be used for 8.10 support
Other 8.10 PR's #3858 use 7.8