README still called the GTK picker and mirroring pipeline stubs. Both
are built: breadcastd discovers Cast and DLNA devices and owns the
session; breadcast is the GTK picker. Install is bakery; this is not
on the BOS ISO.
CONTRIBUTING now follows the ecosystem single-trunk main + RC-tag
model. Leftover dev/beta CI workflows are documented, not rewritten.
bread-theme and bread-utils already pin bread-ecosystem v0.7.1.
