fix: add historical import jobs to unified jobs list

Historical import jobs were not appearing in the recent jobs list because
list_letzshop_jobs() only queried marketplace_import_jobs and letzshop_sync_logs.

Changes:
- Add LetzshopHistoricalImportJob query to list_letzshop_jobs()
- Add current_phase and error_message fields to LetzshopJobItem schema
- Fixed stuck job 8 (marked as failed)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app/services/letzshop/order_service.py

@@ -556,11 +556,42 @@ class LetzshopOrderService:
         """
         List unified Letzshop-related jobs for a vendor.
 
-        Combines product imports from marketplace_import_jobs and
-        order syncs from letzshop_sync_logs.
+        Combines product imports, historical order imports, and order syncs.
         """
         jobs = []
 
+        # Historical order imports from letzshop_historical_import_jobs
+        if job_type in (None, "historical_import"):
+            hist_query = self.db.query(LetzshopHistoricalImportJob).filter(
+                LetzshopHistoricalImportJob.vendor_id == vendor_id,
+            )
+            if status:
+                hist_query = hist_query.filter(
+                    LetzshopHistoricalImportJob.status == status
+                )
+
+            hist_jobs = hist_query.order_by(
+                LetzshopHistoricalImportJob.created_at.desc()
+            ).all()
+
+            for job in hist_jobs:
+                jobs.append(
+                    {
+                        "id": job.id,
+                        "type": "historical_import",
+                        "status": job.status,
+                        "created_at": job.created_at,
+                        "started_at": job.started_at,
+                        "completed_at": job.completed_at,
+                        "records_processed": job.orders_processed or 0,
+                        "records_succeeded": (job.orders_imported or 0)
+                        + (job.orders_updated or 0),
+                        "records_failed": job.orders_skipped or 0,
+                        "current_phase": job.current_phase,
+                        "error_message": job.error_message,
+                    }
+                )
+
         # Product imports from marketplace_import_jobs
         if job_type in (None, "import"):
             import_query = self.db.query(MarketplaceImportJob).filter(