burn-down(docs): relocate 3 Sonar-gated docs to bdchatham-designs (Design 05/06)

[bdchatham]

Un-gates + relocates the 3 code/CRD/skill-referenced docs: seinode-task, seinode-task-lld, test-harness-lld.

11 files repointed (text-only) to canonical bdchatham-designs URLs: .go comments, the ecr.yml CI comment, CLAUDE.md/README/scenarios doc-links. The seinode-task-lld path is published into the generated CRD YAML (mirroring the kubebuilder doc-comments) — the same URL was applied to both the Go source comment and its generated mirror, so they stay consistent and verify-generated passes (no toolchain regen needed). 0 stray refs.

seinode-task's section-headings are cited by the gov-ops skill (PLT-489) in the Tide repo — repointed in a paired Tide PR.

docs/ now holds only Amir's design-e2e-kind-harness (his merge). Paired add: bdchatham-designs#25. Linear: PLT-497

🤖 Generated with Claude Code

[cursor]

PR Summary

Low Risk
Documentation relocation and comment/CRD description URL updates only; no runtime or API schema logic changes beyond embedded help text in the CRD.

Overview
Moves three in-repo design/operator docs (seinode-task.md, seinode-task-lld.md, test-harness-lld.md) out of docs/ and makes bdchatham-designs the canonical home (Design 05/06, PLT-497).

References are repointed across Go package comments, CLAUDE.md, README.md, scenarios/README.md, .github/workflows/ecr.yml, and SeiNodeTask CRD OpenAPI descriptions in config/crd/ and manifests/ so they match the updated kubebuilder doc-comments (same URL in source + generated YAML; no API behavior change).

CLAUDE.md still calls out that seinode-task section headings are cited anchors for the gov-ops skill (PLT-489)—those links now target the external doc; a paired Tide PR updates that consumer.

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