test(gateway): cover null start_time scoped-lock self-reacquire

Regression for Discord 503 reconnect false-positive discord-bot-token
lock against the live gateway PID (#81468).

tests/gateway/test_status.py

@@ -418,6 +418,62 @@ class TestScopedLocks:
         assert payload["pid"] == os.getpid()
         assert payload["metadata"]["platform"] == "telegram"
 
+    def test_acquire_scoped_lock_self_reacquires_when_disk_start_time_null(
+        self, tmp_path, monkeypatch
+    ):
+        """#81468: same PID with on-disk start_time=null must self-reacquire.
+
+        After Discord 503 reconnect, the scoped lock still names this process
+        but may carry ``start_time: null`` (psutil miss at first write). The
+        freshly built record has a real fingerprint. Requiring equality made
+        the gateway report its own PID as a foreign token squatter.
+        """
+        monkeypatch.setenv("HERMES_GATEWAY_LOCK_DIR", str(tmp_path / "locks"))
+        lock_path = tmp_path / "locks" / "discord-bot-token-2bb80d537b1da3e3.lock"
+        lock_path.parent.mkdir(parents=True, exist_ok=True)
+        lock_path.write_text(json.dumps({
+            "pid": os.getpid(),
+            "start_time": None,
+            "kind": "hermes-gateway",
+            "argv": ["hermes_cli/main.py", "--profile", "milena", "gateway", "run", "--replace"],
+            "scope": "discord-bot-token",
+        }))
+
+        # Live process can resolve start_time; disk cannot — the mismatch
+        # that previously failed the self-reacquire short-circuit.
+        monkeypatch.setattr(status, "_get_process_start_time", lambda pid: 987654321)
+        # If we wrongly fall through to staleness, a gateway-looking self PID
+        # would be treated as a live foreign holder (return False).
+        monkeypatch.setattr(status, "_pid_exists", lambda pid: True)
+        monkeypatch.setattr(status, "_looks_like_gateway_process", lambda pid: True)
+
+        acquired, existing = status.acquire_scoped_lock(
+            "discord-bot-token", "secret", metadata={"platform": "discord"}
+        )
+
+        assert acquired is True
+        assert existing["pid"] == os.getpid()
+        payload = json.loads(lock_path.read_text())
+        assert payload["pid"] == os.getpid()
+        assert payload["start_time"] == 987654321
+        assert payload["metadata"]["platform"] == "discord"
+
+    def test_release_scoped_lock_allows_null_disk_start_time(self, tmp_path, monkeypatch):
+        """#81468: release must not no-op when disk start_time is null."""
+        monkeypatch.setenv("HERMES_GATEWAY_LOCK_DIR", str(tmp_path / "locks"))
+        lock_path = tmp_path / "locks" / "discord-bot-token-2bb80d537b1da3e3.lock"
+        lock_path.parent.mkdir(parents=True, exist_ok=True)
+        lock_path.write_text(json.dumps({
+            "pid": os.getpid(),
+            "start_time": None,
+            "kind": "hermes-gateway",
+        }))
+        monkeypatch.setattr(status, "_get_process_start_time", lambda pid: 987654321)
+
+        status.release_scoped_lock("discord-bot-token", "secret")
+
+        assert not lock_path.exists()
+
 
     def test_acquire_scoped_lock_race_second_acquirer_loses(self, tmp_path, monkeypatch):
         """Two racing starters both observe the same stale lock. The loser's