Update app.py

app.py

@@ -28,6 +28,13 @@ from collections import defaultdict
 from contextlib import asynccontextmanager
 from typing import Optional, List, AsyncGenerator
 
+# Process boot time, captured at import so it is set before any heavy
+# module-level work and before lifespan runs. Exposed on /api/health so
+# the uptime monitor can distinguish "still running" from "died and came
+# back between polls" — a restarted container reports RUNNING and 200 at
+# both polls, but its boot_ts moves.
+BOOT_TS = time.time()
+
 from fastapi import FastAPI, HTTPException, Request
 from fastapi.middleware.cors import CORSMiddleware
 from fastapi.staticfiles import StaticFiles
@@ -762,10 +769,16 @@ async def health():
     The `sources` block is the honest answer to "where do this system's facts
     come from, and are those sources actually reachable right now?"
     """
+    now = time.time()
     return {
         "status": "ok",
         "service": "ResearchBee",
         "version": "1.4.0",
+        # Restart detection for the uptime monitor. boot_ts is the stable
+        # identity of this process; when it changes between two polls the
+        # container was replaced, whatever the HTTP status said.
+        "boot_ts": round(BOOT_TS, 3),
+        "uptime_s": round(now - BOOT_TS, 1),
         "sources": {
             "oaworks": {
                 "endpoint": oaworks.OA_WORKS_BASE + oaworks.PERMISSIONS_PATH,