Integrate 127aa7a with the newer property-specific Host contract from 805323a. Preserve owned role and ARIA checks, callback and Behavior composition, and caller overrides for ordinary metadata. Carry the historical live-buffer unmount assertions into the current render-port revision test. Regression execution was waived; syntax and diff checks passed.
Add retained state, Data Controller, and Resource lifecycle applications under examples, with paired guidance and public-path interaction tests.
Verified with make check (57 behavior tests and 5 docs tests), make load, byte compilation, checkdoc, and GUI width checks at 784px body width.
