Migrate Policy retention interfaces

src/govoplan_policy/backend/manifest.py

@@ -161,7 +161,24 @@ manifest = ModuleManifest(
                 "scheduling",
                 "reporting",
             ),
-            metadata={"kind": "reference"},
+            metadata={
+                "kind": "workflow",
+                "route": "/admin?section=system-retention",
+                "screen": "Retention administration",
+                "help_contexts": ["policy.retention", "privacy.retention"],
+                "prerequisites": [
+                    "Policy and Access are enabled.",
+                    "The actor may read policy settings at the selected scope.",
+                ],
+                "steps": [
+                    "Inspect the effective value and its policy source path.",
+                    "Narrow only fields that the parent policy permits this scope to override.",
+                    "Save the policy, then run a system dry run before applying retention.",
+                    "Verify bounded outcome and audit evidence after an applied run.",
+                ],
+                "outcome": "The selected scope has an explainable retention policy and any destructive application is preceded by a dry-run review.",
+                "verification": "Reload the policy, confirm its source path, and compare the dry-run or applied outcome table with audit evidence.",
+            },
         ),
     ),
     migration_spec=MigrationSpec(