feat(orchestration): add orchestration system with task scheduling

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

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

backend/app/agents/orchestration/monitor.py

@@ -0,0 +1,31 @@
+from __future__ import annotations
+
+from typing import Any
+
+
+def build_parallel_runtime_metrics(
+    *,
+    task_graph: dict[str, Any] | None,
+    scheduled_subtasks: list[dict[str, Any]] | None,
+    task_results: list[dict[str, Any]] | None,
+    merge_report: dict[str, Any] | None,
+) -> dict[str, Any]:
+    task_graph = task_graph or {}
+    scheduled_subtasks = list(scheduled_subtasks or [])
+    task_results = list(task_results or [])
+    merge_report = merge_report or {}
+
+    completed = sum(1 for item in task_results if item.get("status") == "completed")
+    failed = sum(1 for item in task_results if item.get("status") == "failed")
+    blocked = sum(1 for item in task_results if item.get("status") == "blocked")
+
+    return {
+        "task_graph_node_count": len(task_graph.get("nodes") or []),
+        "scheduled_subtask_count": len(scheduled_subtasks),
+        "completed_subtask_count": completed,
+        "failed_subtask_count": failed,
+        "blocked_subtask_count": blocked,
+        "merge_status": merge_report.get("status"),
+        "merge_conflict_count": len(merge_report.get("conflict_flags") or []),
+        "fallback_used": bool(merge_report.get("fallback_used") or False),
+    }