Update policy management and documentation

- Bumped the version of the `lol.mleku.dev` dependency from v1.0.3 to v1.0.4.
- Removed redundant checks for disabled policy in event handling.
- Introduced a `default_policy` field in the policy configuration, allowing for more flexible event handling based on default behaviors.
- Enhanced documentation to clarify the default policy logic and its implications on event processing.
- Updated tests to validate the new default policy behavior and ensure correct fallback mechanisms are in place.

pkg/policy/benchmark_test.go

@@ -101,7 +101,6 @@ done
 		configDir:    tempDir,
 		scriptPath:   scriptPath,
 		enabled:      true,
-		disabled:     false,
 		responseChan: make(chan PolicyResponse, 100),
 	}