Initial InfraPulse scaffold

worker/app/jobs/notifications.py

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+from dataclasses import dataclass
+
+import httpx
+
+
+@dataclass(frozen=True)
+class WebhookNotification:
+    url: str
+    text: str
+
+
+async def send_generic_webhook(notification: WebhookNotification) -> None:
+    async with httpx.AsyncClient(timeout=10) as client:
+        await client.post(notification.url, json={"text": notification.text})