[Storage] Flattened clients v3#3125

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vincenttran-msft wants to merge 3 commits intoAzure:mainfrom

vincenttran-msft:vincenttran/flat_v3

Commits on Oct 6, 2025

initial gen + migrate flat code
vincenttran-msft
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Commits on Oct 7, 2025

Round 1 PR feedback, look into parameterization
vincenttran-msft
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Commits on Oct 8, 2025

Handle encoding to align with Storage SDK convention
vincenttran-msft
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