A worktree here reached 3.8GB beside the main checkout's 2.2GB, and a cold build compiles a bundled libsqlite3 before it can run a test. Records the shared target directory, the stale-binary hazard that comes with it, and the three tests that are not plain cargo test - the oracle ones, the release-only performance ratchet, and the Node smoke test over the wasm boundary. Change-Id: I7da0a1829b2e6d49a9eaa1513dfccba13d039f08