feat(workflows): store shared sandbox tenant state

.github/scripts/check-idor-model-coverage.py

@@ -324,6 +324,7 @@ def get_scoped_models() -> tuple[dict[str, set[str]], set[str], set[str], set[st
         "DevStackImageTarget",
         "DevStackImageAttempt",
         "License",
+        "SandboxSenderTenantState",  # instance-global mirror of the shared sandbox SES tenant state
         # --- Deprecated ---
         "Prompt",
         "PromptSequence",

products/workflows/backend/migrations/0037_sandbox_sender_tenant_state.py

@@ -0,0 +1,32 @@
+# Generated by Django 5.2.18 on 2026-10-12 15:31
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("workflows", "0036_teamworkflowsconfig_email_utm_defaults"),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="SandboxSenderTenantState",
+            fields=[
+                (
+                    "id",
+                    models.BigAutoField(
+                        auto_created=True,
+                        primary_key=True,
+                        serialize=False,
+                        verbose_name="ID",
+                    ),
+                ),
+                ("tenant_name", models.CharField(max_length=64, unique=True)),
+                (
+                    "sending_status",
+                    models.CharField(blank=True, db_default="", default="", max_length=32),
+                ),
+                ("synced_at", models.DateTimeField(blank=True, null=True)),
+            ],
+        ),
+    ]

products/workflows/backend/migrations/max_migration.txt

@@ -1 +1 @@
-0036_teamworkflowsconfig_email_utm_defaults
+0037_sandbox_sender_tenant_state

products/workflows/backend/models/__init__.py

@@ -4,6 +4,7 @@
 from .hog_flow_optimization import HogFlowOptimization
 from .hog_flow_revision import HogFlowRevision
 from .hog_flow_schedule.hog_flow_schedule import HogFlowSchedule
+from .sandbox_sender_tenant_state import SandboxSenderTenantState
 from .team_workflows_config import TeamWorkflowsConfig
 from .workflow_idea import WorkflowIdea
 from .workflow_proposal import WorkflowProposal
@@ -15,6 +16,7 @@
     "HogFlowRevision",
     "HogFlowSchedule",
     "HogFlowTemplate",
+    "SandboxSenderTenantState",
     "TeamWorkflowsConfig",
     "WorkflowIdea",
     "WorkflowProposal",

products/workflows/backend/models/sandbox_sender_tenant_state.py

@@ -0,0 +1,9 @@
+from django.db import models
+
+
+class SandboxSenderTenantState(models.Model):
+    """Instance-level mirror of the shared sandbox SES tenant; platform state, not tenant data, so no team_id."""
+
+    tenant_name = models.CharField(max_length=64, unique=True)
+    sending_status = models.CharField(max_length=32, blank=True, default="", db_default="")
+    synced_at = models.DateTimeField(null=True, blank=True)