Implemented durable workflow/job foundation

docs/asset-registry-implementation.md

@@ -65,6 +65,7 @@ and SQLite repositories are adapters behind those ports.
 - Idempotency-key reuse with a different payload raises a validation error.
 - Transformation run and derived lineage persistence for traceable derived
   artifact creation.
+- Workflow template and workflow run persistence for durable job execution.
 - In-memory repository for deterministic tests.
 - SQLite repository for local-first durable asset registry state.
 - SQLite foreign-key enforcement for representation and metadata asset
@@ -89,12 +90,14 @@ and SQLite repositories are adapters behind those ports.
 - `ingestion_jobs`
 - `transformation_runs`
 - `derived_lineage`
+- `workflow_templates`
+- `workflow_runs`
 
 Payloads are stored as compact JSON envelopes while indexed columns carry
 stable lookup fields such as asset ID, lifecycle, representation kind, digest,
 sequence, relationship source/target, actor ID, target, correlation ID,
-idempotency key, transformation status, operation ID, and derived output asset
-ID.
+idempotency key, transformation status, operation ID, derived output asset ID,
+workflow template ID, workflow version, and workflow run status.
 
 ## Not Yet Implemented