This commit: docs(changelog): update whats-new and per-commit entries [skip ci]

Changes – 2025-08-09: Revise "What's New" and per-commit logs (60372c5)

[Impact: High] Several key documents related to the Fabric Adoption Framework, including guides on mission definition, team formation, and organizational preparation, have been removed, potentially impacting strategic planning for Microsoft Fabric adoption.
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[Impact: Medium] A new document has been created that introduces the Fabric Adoption Framework and outlines best practices, including a table of contents and sections on key considerations and adoption scenarios.
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[Impact: Medium] The sidebar has been updated to display the categories "1 - Define strategy" and "Foundational methodologies" as collapsed by default, enhancing navigation and reducing clutter.
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[Impact: Medium] The document assess-your-fabric-adoption-strategy.md, which provided structured guidance on evaluating and improving the Microsoft Fabric adoption strategy, has been removed, indicating a potential consolidation of information.
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[Impact: Low] A .DS_Store file has been added and subsequently removed from the docs/methodologies/1-strategy directory, which does not affect the documentation content.
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[Impact: Low] The sidebar category settings have been updated to improve user experience, but no major content changes were made.
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[Impact: Low] No reader-visible documentation changes.
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Why it matters: These changes significantly impact the strategic framework for Microsoft Fabric adoption, affecting how organizations implement and manage their adoption strategies.