All the caching.

Author: HalfVoxel

api/src/multiaccessy/accessy.py

@@ -299,8 +299,9 @@ def get_image_blob(self, image_id: str) -> Response:
         res.cache_control.max_age = 86400  # Cache for 1 day
         res.cache_control.public = True  # Allow public caching
         res.cache_control.immutable = True  # Response will not change
-        res.cache_control.no_cache = False
-        res.cache_control.no_store = False
+        res.cache_control.no_cache = None  # Do not force revalidation
+        res.cache_control.no_store = False  # Allow caching
+        res.cache_control.must_revalidate = False  # Allow using cache if connection fails
         return res
 
     def get_member_id_from_accessy_id(self, accessy_id: UUID) -> Optional[int]: