Cover MultiStreamProjection samples and add batch-aware Pattern 4 (#4261)#4263

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jeremydmiller merged 1 commit intomasterfrom

fix/4261-multistream-projection-samples

Apr 17, 2026

Commits on Apr 17, 2026

Add coverage, correct docs, and introduce Pattern 4 for cross-stream grouping (#4261)

jeremydmiller
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claude
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