feat(services): enhance services with rollback and observability

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

backend/app/services/runtime_observability.py

@@ -0,0 +1,32 @@
+from __future__ import annotations
+
+from typing import Any
+
+from app.agents.orchestration.monitor import build_parallel_runtime_metrics
+
+
+def build_runtime_observability_report(
+    *,
+    state: dict[str, Any],
+    feature_flags: dict[str, bool] | None = None,
+) -> dict[str, Any]:
+    task_graph = state.get("task_graph") if isinstance(state.get("task_graph"), dict) else None
+    scheduled_subtasks = (
+        state.get("scheduled_subtasks") if isinstance(state.get("scheduled_subtasks"), list) else []
+    )
+    task_results = state.get("task_results") if isinstance(state.get("task_results"), list) else []
+    merge_report = state.get("merge_report") if isinstance(state.get("merge_report"), dict) else None
+
+    return {
+        "execution_mode": state.get("execution_mode"),
+        "verification_status": state.get("verification_status"),
+        "skill_shortlist_count": len(state.get("skill_shortlist") or []),
+        "retrospective_shortlist_count": len(state.get("retrospective_shortlist") or []),
+        "feature_flags": feature_flags or {},
+        "parallel_metrics": build_parallel_runtime_metrics(
+            task_graph=task_graph,
+            scheduled_subtasks=scheduled_subtasks,
+            task_results=task_results,
+            merge_report=merge_report,
+        ),
+    }