chore(release): prepare operator 0.0.6

[GatewayJ]

Type of Change

• New Feature
• Bug Fix
• Documentation
• Performance Improvement
• Test/CI
• Refactor
• Other: Release preparation

Related Issues

Refs #226

Summary of Changes

• Align the Operator crate, Helm chart, chart appVersion, lockfiles, documentation, and release binary version at 0.0.6.
• Default chart-managed Operator and Console images to the immutable chart appVersion instead of latest.
• Keep the local, CI, action, and Docker Rust toolchains aligned on stable and add a release metadata consistency gate.
• Add a changelog covering changes since 0.0.5, upgrade actions, behavioral compatibility risks, and rollback considerations.
• Ensure the Helm release workflow updates and packages both chart version fields.

Checklist

• I have read and followed the CONTRIBUTING.md guidelines
• Passed make pre-commit (fmt-check + clippy + test + console-lint + console-fmt-check)
• Added/updated necessary tests
• Documentation updated (if needed)
• CHANGELOG.md updated under [Unreleased] (if user-visible change)
• CI/CD passed

Impact

• Breaking change (CRD/API compatibility)
• Requires doc/config/deployment update
• Other impact: Released charts now select the 0.0.6 Operator and Console image tags by default.

Verification

make release-metadata-check
make pre-commit
RUSTFS_OPERATOR_VERSION=0.0.6-test cargo run --quiet -- --version
helm lint deploy/rustfs-operator
helm template rustfs-operator deploy/rustfs-operator
helm package deploy/rustfs-operator --version 0.0.6 --app-version 0.0.6

Additional Notes

• PR fix(console): enforce protected API routing #229 is already present in the base branch and fixes the Rust 1.98 clippy regressions that blocked CI.
• The release metadata gate keeps all Rust entry points on the latest stable toolchain while allowing future stable compiler and clippy changes to surface in CI.
• Merging this PR prepares the repository for release; publishing the 0.0.6 GitHub release remains a separate maintainer action.

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Thank you for your contribution! Please ensure your PR follows the community standards (CODE_OF_CONDUCT.md) and sign the CLA if this is your first contribution.

[GatewayJ]

@codex

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. Can't wait for the next one!

Reviewed commit: 4091e7821f

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