Release Server 2.0.1

[rmcdaniel]

Summary

• publish Server 2.0.1 with the CommonMark security update merged in Bump league/commonmark from 2.9.0 to 2.10.0 #83
• advance the immutable Helm chart to 0.1.72
• synchronize Server image and deployment consumers with the patch release
• make the memo-transition chart check follow the chart current image tag instead of a stale patch literal

Verification

• source-release tests: 3/3 pass in PHP/Node container
• source-release synchronization check passes
• Helm release tests: 25/25 pass
• memo-transition script syntax check passes
• Composer validation passes (existing exact internal Workflow dependency warning only)
• git diff --check passes