Return plan offers wrt fleets

docs/docs/reference/cli/dstack/offer.md

@@ -4,6 +4,9 @@ Displays available offers (hardware configurations) from configured backends or
 
 The output shows backend, region, instance type, resources, spot availability, and pricing.
 
+!!! info "Experimental"
+    `dstack offer` command is currently an experimental feature. Backward compatibility is not guaranteed across releases.
+
 ## Usage
 
 This command accepts most of the same arguments as [`dstack apply`](apply.md).

src/dstack/_internal/server/background/tasks/process_runs.py

@@ -38,10 +38,12 @@
 from dstack._internal.server.services.prometheus.client_metrics import run_metrics
 from dstack._internal.server.services.runs import (
     fmt,
-    is_replica_registered,
     process_terminating_run,
-    retry_run_replica_jobs,
     run_model_to_run,
+)
+from dstack._internal.server.services.runs.replicas import (
+    is_replica_registered,
+    retry_run_replica_jobs,
     scale_run_replicas,
 )
 from dstack._internal.server.services.secrets import get_project_secrets_mapping