Clean up rust-toolchain.toml and move rustfmt & clippy installs to CI

.github/workflows/ci-basic.yml

@@ -22,6 +22,8 @@ jobs:
       - name: Install dependencies on Ubuntu
         #run: sudo apt-get update && sudo apt-get install -y protobuf-compiler build-essential librocksdb-dev
         run: sudo apt-get update && sudo apt-get install -y protobuf-compiler librocksdb-dev
+      - name: Install formatting & linting tools
+        run: rustup component add rustfmt clippy
       - name: Run tests
         run: cargo test --verbose
       - name: Verify working directory is clean

rust-toolchain.toml

@@ -1,4 +1,3 @@
-# TODO: This file does not exist in the original Zebra repo - consider removing it before the final merge.
+# TODO: Upstream specifies `channel = "stable"` — consider restoring it before final merge.
 [toolchain]
 channel = "1.82.0"
-components = [ "clippy", "rustfmt" ]