[Paulo Lacerda (placerda)]

Summary

• Replace only media/architecture_zero_trust.png, used by README's existing Standalone diagram link, with a full-page lossless PNG rendered directly from page 2 of the updated Visio PDF (not platform page 1 or gateway page 3).
• Preserve the filename and README link. The replacement is 6077 × 4605 pixels at 300 DPI; RGB format, PNG CRC integrity, and DPI were verified. Visual mapping and actual-pixel notes were verified, including the new UI-only default and approved short application note. The old PNG was not resampled.
• Corresponding central homepage diagrams from PDF pages 1 and 3 are published separately in Azure/AI-Landing-Zones main at 7446debda3179b29bb9b9468a181dc71c8cc329a; the conceptual overview is preserved.

Scope

This is a documentation-only correction to the current release asset, following the user's explicit request to update main/docs directly through a PR. The existing release/4.3.0 source branch retains the required main PR workflow; this is not new runtime work or release preparation.

No PDF upload, code, manifest, version, changelog, tags, GitHub Release, Azure resources, workflow, or policy changes. Version remains v4.3.0.

Verified diff

• Head: a1f01034e59f6b055af415e6a8742ce0d1b16d6f (release/4.3.0).
• Base: main (85bc0f800d2c3ab423e1e620d6d2e5ab27fd925e at creation).
• Only changed path: media/architecture_zero_trust.png.
• Working tree clean.

CI, SHA-guarded merge, and live-byte verification are owned by the coordinating session.