DOC-6619 Streaming use case examples

[andy-stark-redis]

Note

Low Risk
Primarily adds documentation and sample/demo code; low risk to existing functionality, though the new examples are large and should be sanity-checked for correctness around XAUTOCLAIM and DELCONSUMER flows.

Overview
Adds a new Redis streaming use case section (content/develop/use-cases/streaming/_index.md) and publishes two end-to-end, runnable examples for Streams consumer groups in Go (go-redis) and .NET (StackExchange.Redis), including small local web UIs that can produce events, inspect group/PEL state, replay via XRANGE, trim retention, and trigger XAUTOCLAIM recovery.

Extends the Redis use-case port audit checklist with new rules covering (1) client-library XAUTOCLAIM wrappers that drop the Redis 7+ deleted-IDs slot and (2) safety requirements for handover-then-delete when removing a consumer (XCLAIM/XPENDING before XGROUP DELCONSUMER).

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[github-actions]

DOC-6619

[github-actions]

Staging links:
https://redis.io/docs/staging/DOC-6619-streaming-use-case/develop/use-cases/streaming/
https://redis.io/docs/staging/DOC-6619-streaming-use-case/develop/use-cases/streaming/dotnet/
https://redis.io/docs/staging/DOC-6619-streaming-use-case/develop/use-cases/streaming/go/
https://redis.io/docs/staging/DOC-6619-streaming-use-case/develop/use-cases/streaming/java-jedis/
https://redis.io/docs/staging/DOC-6619-streaming-use-case/develop/use-cases/streaming/java-lettuce/
https://redis.io/docs/staging/DOC-6619-streaming-use-case/develop/use-cases/streaming/nodejs/
https://redis.io/docs/staging/DOC-6619-streaming-use-case/develop/use-cases/streaming/php/

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[dwdougherty]

LGTM. Head's up: 8.8 adds an XNACK command that might be useful here.

a17a063

[andy-stark-redis]

@dwdougherty Thanks for the review and for the tip about XNACK :-)