[Superseded] Emulator reliability and compatibility: five category issues #1659

This combined issue has been decomposed into five detailed category issues. Implementation, validation, and progress tracking now belong in the replacements below.

Replacement issues

Each replacement contains baseline/source evidence, observed versus unconfirmed findings, actionable work, validation scenarios, acceptance criteria, related existing work, and links to the other categories. The compatibility issue additionally defines report metadata, stored artifacts, metrics, gameplay checks, and scoped completion claims.

Closing this combined issue because it has been superseded by the five replacements. This closure does not mean their implementation work is complete.