[Timofei Larkin (lllamnyp)]

Sets the chart's version/appVersion and the Makefile's CHART_VERSION to 0.2.0, ahead of tagging v0.2.0. Cozystack copies chart/address-controller/ from the tagged commit, so the chart version has to match the tag. v0.1.0 was prepared the same way (#4). The schema table in docs/operating.md moves its "unreleased" row to v0.2.0.

After merge, tagging v0.2.0 on main makes the release workflow publish ghcr.io/cozystack/address-controller:0.2.0 and :0.2.

Changes since v0.1.0

• Auto-claim (Auto-claim addresses for LoadBalancer Services that name no claim #7): a LoadBalancer Service that names no claim gets one, controlled by the Service.
  • The class comes from the Service's local.sdn.cozystack.io/ip-address-class or the class marked is-auto-claim-class.
  • Services carrying a backend pool, pin or sharing annotation are skipped, as are those that opt out with local.sdn.cozystack.io/auto-claim: "false".
• Owner rule (Auto-claim addresses for LoadBalancer Services that name no claim #7): a claim with a controller owner deletes its addresses with it, whatever the reclaimPolicy.
• Claim binding (Auto-claim addresses for LoadBalancer Services that name no claim #7): a Lost address is not replaced, reclaim leaves Conflict/Lost as they are, and pre-bindings are checked for class and family.
• Class-deletion guard (Hold a deleted IPAddressClass until its addresses are gone #10): a deleted class is held until its addresses are gone, and is not chosen for new claims meanwhile.
• releaseDelay (Return Released addresses to the pool after a class's releaseDelay #11): a class's Released addresses return to Available after the delay, unless annotated held. IPAddress gains a core-set Bound condition.
• Metrics (Report the ledger as metrics, with an optional ServiceMonitor and alerts #12): gauges for addresses and claims, plus an optional metrics Service, ServiceMonitor and PrometheusRule.
• Admission policy (Ship an optional admission policy reserving IPAddressClaim.spec.addressName #13): an optional policy reserving IPAddressClaim.spec.addressName.
• Operator guide (Document adoption, teardown and CRD upgrades for operators #14): docs/operating.md.
• Organization move (Move module, image and copyright to Cozystack #5): the module path, image and copyright moved to Cozystack.

Upgrade notes

• CRDs: apply them with make install-crds; Helm does not upgrade crds/. The schema changes are additive: IPAddressClass.spec.releaseDelay, and the Bound condition on IPAddress.
• ClusterRole: it now needs Service get/list/watch/patch, create on claims, and update on class finalizers. The chart's regenerated role carries them.
• Nothing changes in behaviour until a class is marked is-auto-claim-class or a Service names a class. Before marking one, deploy a metallb-iad build with the placeholder opt-out (Opt placeholders out of the core's auto-claim metallb-iad#5).

Supersedes #6.

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