carbon6 0.2.2

• The policies test waits for the denial to reach the head's log
• The assistant listens for an approval or an answer before asking, so one given the moment it shows is not lost
• make check runs clippy on every target and the wasm UI too, so CI fails on clippy warnings
• Worker tests that restart a worker wait for the old one to let go of its state directory, and the workflow test waits for the step's decision
• No build warnings anywhere: tract is optimized in dev builds (the memex test binaries outgrew macOS's compact unwind tables), and make check, run by CI on Linux and macOS, fails on any warning