docs/gaps.md, docs/parity-checklist.md, docs/whats-new.md: both sides kept; the PR's sentences added to main's rows and entries.
docs/xmp-interop.md: capture-time paragraph combines both sides.
The PR's test file crates/engine/src/tests_import.rs landed in crates/engine/src/tests/import.rs (moved on main).
crates/meta/src/xmp.rs: kept main's 'mod tests;'; the PR's two tests ported to xmp/tests.rs.
docs/gaps.md, docs/parity-checklist.md, docs/whats-new.md: both sides kept; newer date in headers; XMP row and header carry the PR's sentence.