fix(release): fail closed on dashboard parse errors

tools/release/govoplan_release/planner.py

@@ -18,6 +18,17 @@ def build_release_plan(dashboard: ReleaseDashboard) -> ReleasePlan:
     target_version = dashboard.target_version
     target_tag = dashboard.target_tag
 
+    for index, error in enumerate(dashboard.collection_errors, start=1):
+        actions.append(
+            PlanAction(
+                id=f"dashboard:{error.code}:{index}",
+                title=f"Release metadata is unreadable in {error.repo or 'the workspace'}",
+                detail=f"{error.message} {error.remediation}",
+                severity="blocker",
+                repo=error.repo,
+            )
+        )
+
     for repo in dashboard.repositories:
         if not repo.exists:
             actions.append(