fix: serialize media publishing decisions

apps/api/app/media_catalog.py

@@ -12,6 +12,11 @@ KNOWN_MEDIA_ROLES = WATERBODY_MEDIA_ROLES | TACKLE_MEDIA_ROLES
 MEDIA_ROLES_BY_ENTITY = {"waterbody": WATERBODY_MEDIA_ROLES, "tackle": TACKLE_MEDIA_ROLES}
 
 
+def media_manifest_version() -> int:
+    manifest = json.loads((MEDIA_ROOT / "manifest.json").read_text(encoding="utf-8"))
+    return max(1, int(manifest.get("version", 1)))
+
+
 def _public_role_allowed(entity_type: str | None, role: object) -> bool:
     if role is None:
         return True