docs: add chunk retrieval architecture diagrams (PE-8468)#474

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PE-8468-architecture-diagrams

Commits on Aug 18, 2025

docs: add chunk retrieval architecture diagrams (PE-8468)

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docs: improve chunk component architecture diagram clarity (PE-8468)

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docs: rename and improve chunk retrieval cascade diagram (PE-8468)

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docs: add contiguous data retrieval cascade diagram (PE-8468)

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docs: add Release 47 contiguous data retrieval sequence diagram (PE-8468)

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docs: add Release 47 bundle header parsing sequence diagram (PE-8468)

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