demo mode

apps/core/health.py

@@ -1,9 +1,12 @@
 from __future__ import annotations
 
+import secrets
 from dataclasses import asdict, dataclass
 
+from django.conf import settings
+from django.core.cache import cache
 from django.db import connections
-from django.db.utils import OperationalError
+from django.db.utils import DatabaseError
 
 
 @dataclass(frozen=True)
@@ -23,7 +26,20 @@ def readiness() -> HealthResult:
             cursor.execute("SELECT 1")
             cursor.fetchone()
         checks["database"] = "ok"
-    except OperationalError as exc:
+    except DatabaseError as exc:
         ok = False
         checks["database"] = f"error:{exc.__class__.__name__}"
+
+    if getattr(settings, "HEALTHCHECK_REQUIRE_CACHE", False):
+        key = f"health:{secrets.token_hex(8)}"
+        try:
+            cache.set(key, "ok", timeout=10)
+            if cache.get(key) != "ok":
+                raise RuntimeError("cache roundtrip failed")
+            cache.delete(key)
+            checks["cache"] = "ok"
+        except Exception as exc:  # Health boundary: report category, never payload/details.
+            ok = False
+            checks["cache"] = f"error:{exc.__class__.__name__}"
+
     return HealthResult(ok=ok, checks=checks)