feat: improve error handling in HTTP requests and database fixture loading

vendor/spid-cie-oidc-django/spid_cie_oidc/entity/http_client.py

@@ -2,12 +2,26 @@ import aiohttp
 import asyncio
 
 
+def _body_preview(body: str, limit: int = 256) -> str:
+    if not body:
+        return ""
+    preview = body[:limit].strip()
+    if len(body) > limit:
+        return f"{preview}..."
+    return preview
+
+
 async def fetch(session, url, httpc_params: dict = {}):
     async with session.get(url, **httpc_params.get("connection", {})) as response:
+        body = await response.text()
         if response.status != 200: # pragma: no cover
-            # response.raise_for_status()
-            return ""
-        return await response.text()
+            raise RuntimeError(
+                "HTTP GET failed for "
+                f"{url}: status={response.status} "
+                f"content_type={response.headers.get('Content-Type', '')} "
+                f"body_preview={_body_preview(body)}"
+            )
+        return body
 
 
 async def fetch_all(session, urls, httpc_params):