feat(core): make discovery cache environment variable partial by default (#1682)

Author: brendt

.env.example

@@ -8,7 +8,7 @@ BASE_URI=http://localhost:8000
 INTERNAL_CACHES=true
 
 # Enable or disable discovery cache. Can be `true`, `partial` or `false`.
-DISCOVERY_CACHE=false
+DISCOVERY_CACHE=partial
 
 # Overwrite default log paths (null = default)
 DEBUG_LOG_PATH=null