`d0a9c73` switched the lane to a release Cargo profile alongside the release variant. The variant was the point; the profile was mine, and it broke the build (run 4077): `generateUniffiBindings` fails with "No UniFFI metadata found" on the release `.so`. The workspace release profile sets `strip = true`, and uniffi's `--library` mode finds its interface metadata through symbols. That is the obvious suspect and it is recorded as a suspect, not a finding — `lto = true` dropping the metadata statics would print the identical message and the two have not been told apart. Backed out to the debug profile rather than guessing at a fix, because the two halves of that commit are not equally important. Signing and a rising versionCode are what make an install replace the last one instead of wiping the notes; the Rust profile only makes the result faster. The APK this produces is no worse than every previous build, all of which shipped a debug-profile `.so`. Recorded as Scribe #2810 with the four candidate fixes and, more usefully, the instruction to establish the cause on a host build before spending another four-minute cold cross-compile on a guess.