release: DocFerry 0.0.67 corrective update

[veil-chow-fyaic]

Summary

• publish the reviewed 0.0.67 corrective plugin source
• harden PKCE/session custody, entitlement/quota checks, Advanced Import retries, and Share migration/lifecycle
• refresh public privacy, migration, Free/Pro, and release documentation

Verification

• npm ci
• npm --prefix plugin ci
• npm run check:release (134 tests, lint, build, public-source and secret scan)
• main.js SHA-256: d7a80350392625f2cb443437570d05825b7908af99d19f3fdc45848c6196dd58
• manifest.json SHA-256: b0d5d1964be1f7562200ce3cf31209a9c08a92104b001f282323e953d67517b9
• styles.css SHA-256: d31230d0fec77d0393c3f6a970aebb202350acc5e0806c1b016a89fdc36e48f3

The public repository retains its intentional MIT license and excludes backend, operator, provider, and private evidence material.