v0.21.1 - Windows Proof and Adoption Polish

v0.21.1 - Windows Proof and Adoption Polish

Agent Memory Bridge 0.21.1 is a narrow compatibility and adoption patch over
the v0.21 governed-memory release.

0.21.1 = the fixed v0.21 proof made patch-safe and Windows-safe, with clearer client setup assets.

What Changed

• Canonicalized the fixed v0.21 manifest to LF bytes before SHA256 validation,
  so Windows CRLF checkout behavior does not invalidate unchanged proof input.
• Made every 0.21.x package inherit the fixed 0.21.0 governed-change proof
  instead of falling back to the historical v0.20 clean-room proof.
• Kept the proof report's release and target_release semantics fixed at
  0.21.0; the package version advances independently to 0.21.1.
• Added a concise GitHub-source install path for coding agents and expanded
  documented client configuration support, including VS Code / Copilot.
• Modernized the bilingual README positioning and replaced the large overview
  PNG with a compact SVG.

Validation

• pytest: 373 passed
• focused release-contract and governed-change proof tests: passed
• public MCP surface: unchanged at 10 tools
• governed-change report and manifest release fields: unchanged at 0.21.0

Boundaries

This patch does not widen the MCP surface, regenerate the fixed governed-change
report, alter its manifest, write client configuration automatically, or claim
vendor certification. Client setup output remains documentation or local
renderer output, and durable writeback remains explicit.