fix: review findings (async SQS dispatcher, backoff, batch insert, shutdown order, pagination, HMAC) + loadtest fixes; v0.1.6

loadtests/common.py

@@ -49,13 +49,23 @@ class API:
     def _req(self, method, path, body=None):
         url = self.base + path
         data = json.dumps(body).encode() if body is not None else None
-        req = urllib.request.Request(
-            url, data=data, method=method,
-            headers={"Authorization": "Bearer " + self.token,
-                     "Content-Type": "application/json"},
-        )
-        with urllib.request.urlopen(req, timeout=30, context=self.ctx) as r:
-            return json.loads(r.read().decode())
+        # Внешний путь платформы даёт таймауты ~31-33с (~5.5% запросов) —
+        # ретраи 3 с паузами (см. doc/sqs-integration.md, тикет Nubes).
+        last = None
+        for attempt in range(3):
+            try:
+                req = urllib.request.Request(
+                    url, data=data, method=method,
+                    headers={"Authorization": "Bearer " + self.token,
+                             "Content-Type": "application/json"},
+                )
+                with urllib.request.urlopen(req, timeout=15, context=self.ctx) as r:
+                    raw = r.read().decode()
+                    return json.loads(raw) if raw.strip() else {}
+            except Exception as e:
+                last = e
+                time.sleep(1 + attempt)
+        raise last
 
     def create_device(self, ns, name, device_id):
         return self._req("POST", f"/v1/namespaces/{ns}/iot/devices",
@@ -70,8 +80,8 @@ class API:
     def delete_device(self, ns, name):
         return self._req("DELETE", f"/v1/namespaces/{ns}/iot/devices/{name}")
 
-    def telemetry(self, ns, device_id="", limit=1000):
-        q = f"?limit={limit}"
+    def telemetry(self, ns, device_id="", limit=1000, offset=0):
+        q = f"?limit={limit}&offset={offset}"
         if device_id:
             q += f"&device_id={device_id}"
         return self._req("GET", f"/v1/namespaces/{ns}/iot/telemetry{q}")