Fix human-readable name for ImageMetadata

The Webpage Capture boefje creates images from HostnameHTTPURL OOIs,
which means that after the normalizer creates an ImageMetadata OOI
its reference points to a HostnameHTTPURL OOI instead of an HTTPResource
OOI. #1560 was created to fix this, but for
now we can fix the human-readable name by trying to the reference as a
HTTPResource first and HostnameHTTPURL if this fails.

This fixes the "IndexError at /en/mispoes/objects/, pop from empty list"
error.

octopoes/octopoes/models/ooi/web.py

@@ -219,18 +219,24 @@ class ImageMetadata(OOI):
 
     @classmethod
     def format_reference_human_readable(cls, reference: Reference) -> str:
-        t = reference.tokenized
-
-        port = f":{t.resource.web_url.port}" if t.resource.web_url.port else ""
         try:
-            netloc = t.resource.web_url.netloc.address
-        except KeyError:
-            netloc = t.resource.web_url.netloc.name
-
-        web_url = f"{t.resource.web_url.scheme}://{netloc}{port}{t.resource.web_url.path}"
-        address = t.resource.website.ip_service.ip_port.address.address
-
-        return f"{web_url} @ {address}"
+            t = reference.tokenized
+
+            port = f":{t.resource.web_url.port}" if t.resource.web_url.port else ""
+            try:
+                netloc = t.resource.web_url.netloc.address
+            except KeyError:
+                netloc = t.resource.web_url.netloc.name
+
+            web_url = f"{t.resource.web_url.scheme}://{netloc}{port}{t.resource.web_url.path}"
+            address = t.resource.website.ip_service.ip_port.address.address
+
+            return f"{web_url} @ {address}"
+        except IndexError:
+            # try parsing reference as a HostnameHTTPURL instead
+            tokenized = HostnameHTTPURL.get_tokenized_primary_key(reference.natural_key)
+            port = f":{tokenized.port}" if tokenized.port else ""
+            return f"{tokenized.scheme}://{tokenized.netloc.name}{port}{tokenized.path}"
 
 
 class RESTAPI(OOI):