Add deprecation notices for Credential Manager and Stub Findings#14613

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Maffooch wants to merge 3 commits intodevfrom

deprecation/credential-manager-stub-findings-2.57.0

Commits on Mar 30, 2026

Add deprecation notices for Credential Manager and Stub Findings in 2.57.0

Maffooch
and
claude
committed

Commits on Apr 1, 2026

Add deprecation warning messages to Credential Manager and Stub Findings UI pages

Maffooch
and
claude
committed
Move real version/date to each decorator call site, use placeholders as defaults

Maffooch
and
claude
committed