Test: documentation pass on arcane-core public API

[martinjms]

Goal

Add missing doc comments to the public API of arcane-core's main traits and types. Three sub-issues, each self-contained.

Sub-issues

• Add doc comments to IClusteringModel and related types #97 — Add doc comments to IClusteringModel and related types
• Add doc comments to the four-bucket state model types #98 — Add doc comments to the four-bucket state model types (depends on Add doc comments to IClusteringModel and related types #97)
• Add doc comments to connection types and protocol enums #99 — Add doc comments to connection types and protocol enums (depends on Add doc comments to the four-bucket state model types #98)

Branch

epic/test-doc-pass

Notes

This is a test of the gh-conductor automation chain. All changes are documentation-only.

[martinjms]

⚠️ [Orchestration Halted] orchestration-active label removed. Existing workers will complete naturally; no new dispatches until the label is re-applied.

[martinjms]

✅ #99 — Add doc comments to connection types and protocol enums — completed by PR #102 (merged).