remove many unnecessary debug print, improve large entity handling

.env.example

@@ -25,7 +25,7 @@ DEFAULT_RECURSION_DEPTH=2
 # Default timeout for provider API requests in seconds.
 DEFAULT_TIMEOUT=30
 # The number of concurrent provider requests to make.
-MAX_CONCURRENT_REQUESTS=5
+MAX_CONCURRENT_REQUESTS=1
 # The number of results from a provider that triggers the "large entity" grouping.
 LARGE_ENTITY_THRESHOLD=100
 # The number of times to retry a target if a provider fails.