- Set ECDSA (nistp384) as the default SSH key algorithm for all Flux commands that generate SSH keys, replacing RSA SHA‑1 to comply with GitHub’s policy.
- Added fetch timeout flag to source creation commands, switched label selector to app.kubernetes.io/part-of, and introduced FLUX_SYSTEM_NAMESPACE env var for default namespace.
- Enabled command completion for `flux tree` and updated Docker image tags for the new release.
v0.21.0
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