fix: reconcile and expose failed product cleanup

backend/service/cleanup_service.py

@@ -27,6 +27,7 @@ class TemporaryJob(BaseModel):
 class CleanupReport(BaseModel):
     temporary_jobs: list[TemporaryJob] = Field(default_factory=list)
     pending_products: list[ProductRecord] = Field(default_factory=list)
+    failed_products: list[ProductRecord] = Field(default_factory=list)
     reclaimable_bytes: int = 0
     reminder_job_ids: list[str] = Field(default_factory=list)
     deleted_job_ids: list[str] = Field(default_factory=list)
@@ -70,6 +71,7 @@ class CleanupService:
 
     def preview(self, now: datetime) -> CleanupReport:
         now_utc = _as_utc(now)
+        self.product_store.reconcile_stalled_purges(now_utc)
         protected = self.archive_protected_job_ids()
         temporary_jobs: list[TemporaryJob] = []
         reminder_job_ids: list[str] = []
@@ -99,6 +101,7 @@ class CleanupService:
         return CleanupReport(
             temporary_jobs=temporary_jobs,
             pending_products=pending_products,
+            failed_products=self.product_store.failed_product_cleanups(),
             reclaimable_bytes=sum(item.size_bytes for item in temporary_jobs) + product_bytes,
             reminder_job_ids=reminder_job_ids,
         )