Export Center: format record (service retired, folded into OfflineKit)

Verified against commit 942a18727c (2026-09-26). Re-verify with: grep -n 'exportPlane.Map' src/OfflineKit/StellaOps.OfflineKit.WebService/Program.cs and ls src/__Obsoleted/ExportCenter/.

Pointer stub. The Export Center service retired on 2026-09-12 (SPRINT_20260722_025 OK-10): export-web/export-worker are frozen at src/__Obsoleted/ExportCenter/, the application layer lives at src/OfflineKit/__Libraries/StellaOps.ExportCenter.Application (namespaces kept on purpose), and the export plane is served by offlinekit-web under /api/offlinekit/v1/**; runs execute on offlinekit-worker. The predecessor database stellaops_exportcenter and role exportcenter were dropped on 2026-09-14 in an owner-approved window after parity verification (evidence docs/implplan/_evidence/20260914-ok-closeout/).
Read OfflineKit for topology, runtime, configuration and operations. This folder keeps only documents about formats and protocols the consolidated service still produces or verifies. The retired dossier pages are frozen at docs-archive/modules/export-center/ and describe the pre-consolidation service.

Documents

Document	What it defines	Implemented by (at this commit)
profiles.md	Export profiles, the Assurance profile catalogue	`POST /api/offlinekit/v1/exports/profiles`, `/api/offlinekit/v1/exports/assurance/profiles`
determinism.md	Reproducibility rules EC1 to EC10	checked by `operations/verify-export-kit.sh` against `src/OfflineKit/__fixtures/export-kit/`; only partly emitted by the service (see the page)
provenance-and-signing.md	Attestation and signing lineage	`export_center.export_attestations`, `…/verify` routes
mirror-bundles.md	Mirror bundle layout (mirror is a profile kind, DC-22)	`MirrorBundleBuilder`, `MirrorExportRunMaterializer`
devportal-offline.md	DevPortal offline bundle	`DevPortalOfflineBundleBuilder`, job on `offlinekit-worker`
registry-compatibility.md	OCI referrer discovery per registry	`StellaOps.ExportCenter.Application/Distribution/Oci/`
timestamp-trust-bundle-v1.md	Timestamp trust bundle v1 (the DC-18-shaped specimen)	`StellaOps.OfflineKit.TrustBundle.Contracts` (consumer; producer still owed)
cli.md	`stella export` verbs	`src/Cli/`
operations/kms-envelope-pattern.md	Bundle envelope encryption	`StellaOps.ExportCenter.Core/Encryption/` (library; not enabled in any deployed path)
operations/risk-bundle-provider-matrix.md	Risk-bundle providers and signing baseline	`StellaOps.ExportCenter.RiskBundles`, `RiskBundleJobHandler`
operations/verify-export-kit.sh	Offline export-kit verifier	passes on `src/OfflineKit/__fixtures/export-kit/`
schemas/	JSON schemas of the export profile and manifest (EC1)	consumed by the verifier contract

What is no longer here

The retired export-web OpenAPI specification (bare /v1/exports paths), the architecture, consolidation design, API reference, implementation plan, overview, module contract and trivy adapter record: archived at docs-archive/modules/export-center/.
The live API reference is generated for OfflineKit: ../offlinekit/api-reference.md.
The operations runbook, observability page and Grafana dashboard, whose metrics (exporter_*, export_job_duration_seconds, export_queue_depth and others) and commands have no implementation, and the draft v0.1 DevPortal manifest: archived on 2026-09-26 under docs-archive/modules/export-center/. Metrics the export libraries do emit are defined in src/OfflineKit/__Libraries/StellaOps.ExportCenter.Application/Telemetry/.