chore: register with state hub

CLAUDE.md

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+# email-connect - Claude Code Instructions
+
+This repository uses `AGENTS.md` as the canonical local agent instruction file.
+Claude Code agents should read `AGENTS.md` first and follow the same State Hub
+identity, workplan convention, and repo-specific semantic guardrails.
+
+State Hub identity:
+
+- Domain: `custodian`
+- Repo slug: `email-connect`
+- Topic ID: `cee7bedf-2b48-46ef-8601-006474f2ad7a`
+- Workplan prefix: `EMAIL-WP-`
+
+Core product rule: email events are evidence, not result satisfaction. Do not
+treat provider acceptance, MX acceptance, inbox placement, opens, clicks,
+replies, complaints, or suppressions as proof of human awareness or business
+outcome completion.
+
+Start with `INTENT.md`, then `spec/ProductRequirementsDocument.md`, then the
+active files under `workplans/`.