fix: keep migration and blocker SQL postgres-safe

central/app/control_plane.py

@@ -264,7 +264,7 @@ def blocker_filter_summary(session, *, tenant_id=None, agent_id=None, product_co
     query = _blockers_query(session, tenant_id=tenant_id, agent_id=agent_id, product_code=product_code, blocker_type=blocker_type, field=field, status=status, client=client, installation=installation, search=search, age=age)
     open_count = func.sum(case((BlockedProduct.resolved_at.is_(None), 1), else_=0))
     open_count, = session.execute(query.with_only_columns(open_count).order_by(None)).one()
-    rows = session.execute(query.with_only_columns(func.coalesce(BlockedProduct.field, "OTHER"), func.count(BlockedProduct.id)).group_by(func.coalesce(BlockedProduct.field, "OTHER")).order_by(None)).all()
+    rows = session.execute(_blocker_breakdown_query(query)).all()
     breakdown = {field: 0 for field in BLOCKER_FIELDS}
     for field_name, count in rows:
         key = str(field_name or "").upper()
@@ -279,6 +279,11 @@ def blocker_filter_summary(session, *, tenant_id=None, agent_id=None, product_co
     }
 
 
+def _blocker_breakdown_query(query):
+    """Group on the source column itself for PostgreSQL-safe SQL semantics."""
+    return query.with_only_columns(BlockedProduct.field, func.count(BlockedProduct.id)).group_by(BlockedProduct.field).order_by(None)
+
+
 def list_blockers(session, *, tenant_id=None, agent_id=None, product_code=None, page=1, page_size=50, blocker_type=None, field=None, resolved=False, client=None, installation=None, status="OPEN", age=None, search=None):
     page, page_size = _page(page, page_size)
     if resolved and status == "OPEN":