Prepare Query Doctor 0.11.0 release candidate

[alexandrefimov]

What changed

• Prepares the public Query Doctor 0.11.0 release candidate.
• Adds container, Kubernetes, and Helm deployment support.
• Adds persistent Query Inbox and Online History workflows with SQLite/PostgreSQL operation.
• Adds worker, remediation, readiness, single-profile upload, and bounded Impala EXPLAIN analysis flows.
• Separates the public product from downstream platform runtime and controller integration.

Public/private boundary

• Excludes private platform runtime, contracts, controller wiring, targets, and deployment-specific configuration.
• Keeps private release fingerprints outside the public repository.
• Includes only synthetic screenshots with reviewed provenance.
• This draft does not publish a tag, package, container image, or GitHub release.

Validation

• Full public release gate: 4679 passed, 19 skipped.
• Repository, history, blob, metadata, and private-fingerprint boundary audit passed.
• Gitleaks scanned 670 commits with no leaks found.
• Helm/kubeconform validation passed for 65 of 65 rendered resources.
• Independent fresh-change review verdict: ship.

Publication remains pending until the release image and final release checks are completed.