feat: memory alerts with top-memory process, top offender in alerts, scheduled status reports

monitor.py

@@ -229,6 +229,25 @@ def get_top_processes(n: int = 10) -> list:
     return procs[:n]
 
 
+def get_top_memory(n: int = 10) -> list:
+    """按内存占用排序的 TOP N 进程（无需 CPU 基准采样）。"""
+    procs = []
+    for p in psutil.process_iter(["pid", "name"]):
+        try:
+            if p.info["pid"] in (0, 4):
+                continue
+            procs.append({
+                "pid": p.info["pid"],
+                "name": (p.info["name"] or "?")[:24],
+                "cpu": 0.0,
+                "mem_mb": round(p.memory_info().rss / 1024**2, 1),
+            })
+        except (psutil.NoSuchProcess, psutil.AccessDenied, psutil.ZombieProcess):
+            continue
+    procs.sort(key=lambda x: x["mem_mb"], reverse=True)
+    return procs[:n]
+
+
 def get_uptime() -> float:
     try:
         with open("/proc/uptime") as f: