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- Add `fleet/README.md`: overview of the crates, ADR-023 pointer, quickstart for the e2e ping test, env knobs (`HARMONY_FLEET_E2E`, `FLEET_E2E_KEEP`, `RUST_LOG`), how to connect to NATS from the host and in-cluster, how to inspect the agent, the `harmony-fleet-deploy` production CLI, the operator dashboard, and the roadmap (Zitadel + callout next). - `prune_stale_namespaces` now polls until each pruned namespace is fully gone (up to 90 s). NATS NodePort 30423 is cluster-scoped, so a still-`Terminating` namespace from the prior run was blocking the new bring-up with "provided port is already allocated". Verified: e2e ping test green back-to-back after the fix, with a prior namespace left behind.