Commit remaining Burrow platform work

.github/workflows/build-apple.yml

@@ -54,6 +54,7 @@ jobs:
     - name: Install Rust
       uses: dtolnay/rust-toolchain@stable
       with:
+        toolchain: 1.85.0
         targets: ${{ join(matrix.rust-targets, ', ') }}
     - name: Install Protobuf
       shell: bash
@@ -86,4 +87,4 @@ jobs:
         destination: ${{ matrix.destination }}
         test-plan: ${{ matrix.xcode-ui-test }}
         artifact-prefix: ui-tests-${{ matrix.sdk-name }}
-        check-name: Xcode UI Tests (${{ matrix.platform }})
+        check-name: Xcode UI Tests (${{ matrix.platform }})