fix: send the full webhook and skip /users/me in the point alarm register client

The backend requires a webhook with a delivery policy on every point alarm register call and resolves the account from the caller, so the register client no longer calls /v1/users/me (account is null for some users), no longer sends the accountId-only webhook and no longer relies on IKLIM_WEBHOOK_INITIALIZED.

tests/test_point_alarm.py

@@ -176,9 +176,6 @@ class FakeRegisterService:
         self.payloads: list[dict] = []
         self.recipient_hits: list = []
 
-    def get_account_id(self):
-        return "acc"
-
     def register(self, payload, key):
         self.payloads.append(payload)
         result = self.results.pop(0)
@@ -199,7 +196,11 @@ class RegisterTest(unittest.TestCase):
         self.filter = self.dir / "filter.json"
         self.filter.write_text(json.dumps({"lightning": {"type": "PULSE_IN_CLOUD"}}), encoding="utf-8")
         self.webhook = self.dir / "webhook.json"
-        self.webhook.write_text("{}", encoding="utf-8")
+        self.webhook.write_text(json.dumps({
+            "url": "https://example.com/hook", "httpMethod": "POST", "contentType": "application/json",
+            "authentication": {"selected": "JWT_TOKEN", "options": {"JWT_TOKEN": {"jwtToken": "t"}}},
+            "deliveryPolicy": {"maxAttempts": 3},
+        }), encoding="utf-8")
         self.csv = self.dir / "r.csv"
 
     def run_processor(self, rows: str | None, service) -> list[dict]:
@@ -208,8 +209,7 @@ class RegisterTest(unittest.TestCase):
         processor = PointRegistrationProcessor(
             service, csv_path=self.csv, webhook_config_path=self.webhook, filter_config_path=self.filter
         )
-        with patch.dict(os.environ, {"IKLIM_WEBHOOK_INITIALIZED": "true"}):
-            processor.run()
+        processor.run()
         with self.csv.open(encoding="utf-8-sig", newline="") as handle:
             return list(csv.DictReader(handle, delimiter=";"))
 
@@ -226,7 +226,8 @@ class RegisterTest(unittest.TestCase):
         self.assertEqual(rows[0]["registrationId"], REG_ID)
         self.assertIn("duplicate", rows[1]["errorBody"])
         self.assertEqual(rows[2]["httpStatus"], "NOT_SENT")
-        self.assertEqual(service.payloads[0]["webhook"], {"accountId": "acc"})
+        self.assertEqual(service.payloads[0]["webhook"]["deliveryPolicy"], {"maxAttempts": 3})
+        self.assertNotIn("accountId", service.payloads[0]["webhook"])
         self.assertEqual(service.payloads[0]["filter"]["lightning"]["type"], "PULSE_IN_CLOUD")
         # Re-run: SUCCESS row is skipped, the failed one is retried.
         service2 = FakeRegisterService(