06/08 Optimize queries with indexes fixed

CLAUDE.md

@@ -560,6 +560,7 @@ phase1_projects_roles → phase6_features → phase7_mobile_api → phase8_notif
                         → phase18_issue_reported_by
                             → phase19_issue_mobile_photos
                                 → phase20_inspector_assignments
+                                    → phase21_template_active
                                         → phase21_performance_indexes   ← HEAD
 ```
 
@@ -573,6 +574,10 @@ flask db upgrade
 sudo systemctl restart gunicorn
 ```
 
+### phase21_template_active
+
+Adds `active` boolean column to `inspection_templates` so templates can be deactivated without deletion. Inactive templates are hidden from the inspection-start form but remain accessible in the template management UI. Uses `INFORMATION_SCHEMA` column existence check — safe to re-run.
+
 ### phase19_issue_mobile_photos
 
 Adds `mobile_photo_paths JSON NULL` to `issues` table. Stores extra evidence photos submitted from the iPad at issue-creation time, separate from `result_photos` (resolution photos) so they appear under "Photo Evidence" on the web. Uses `INFORMATION_SCHEMA` existence check — safe to re-run.

migrations/versions/phase21_performance_indexes.py

@@ -25,7 +25,7 @@ import sqlalchemy as sa
 from alembic import op
 
 revision      = 'phase21_performance_indexes'
-down_revision = 'phase20_inspector_assignments'
+down_revision = 'phase21_template_active'
 branch_labels = None
 depends_on    = None