docs: Add confirmed reads configuration to SDK reference docs

[kim]

Confirmed reads are arguably something users should be aware of.

Expected complexity level and risk

1

Testing

Documentation update.

[kim]

/update-llm-benchmark

[clockwork-labs-bot]

LLM Benchmark Results (ci-quickfix)

Language	Mode	Category	Tests Passed	Pass %	Task Pass %
Rust	rustdoc_json	basics	19/27	70.4%	66.7%
Rust	rustdoc_json	schema	24/34	70.6%	63.3%
Rust	rustdoc_json	total	43/61	70.5%	65.2%
C#	docs	basics	27/27	100.0%	100.0%
C#	docs	schema	30/34	88.2%	86.7%
C#	docs	total	57/61	93.4%	93.9%

_{Generated at: 2026-01-14T14:57:32.575Z}