feat/PL 6131/operator compat

[davidmdm]

• feat(PL-6131): make Project CR operator compatible with apimachinery meta
• fix(PL-6131): fix release.chart by making it optional for operator compat

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Note

Low Risk
Two struct-tag changes affect serialization only; no runtime logic or validation paths are modified in this diff.

Overview
Aligns Project and Release API types with Kubernetes operator / apimachinery expectations via struct tag tweaks only.

Project: The embedded metav1.ObjectMeta on ProjectMetadata no longer carries a separate json:"metadata" on the inline field—only yaml:",inline"—so JSON encoding matches how nested metadata is expected for CRD-style resources.

Release: ReleaseSpec.Chart JSON encoding adds omitzero, so an unset/zero ReleaseChart is omitted from JSON instead of always serializing chart, treating chart as optional for operator consumers.

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