Summary

• remove the deprecated inbound command, docs, adapters, TUI/UI surfaces, and provider=inbox domain plumbing
• hide and reject legacy inbox connectors across auth/admin CLI paths, including direct connector show by ID
• wire focused inbound/provider removal and agent checks into make ci-full

Testing

• go test ./internal/cli/admin
• go build -o bin/nylas ./cmd/nylas
• go test ./internal/cli/integration/... -tags=integration -run 'TestCLI_(ConnectorSurfaces_HideInboxProvider|AdminConnectorsCreate_RejectsInboxProvider|AdminConnectorsShow_HidesInboxProvider)$' -v
• make test-cli-regressions
• make test-integration-agent
• make ci-full