Add missing imports: ast, socket, json, statistics

fusion_monitor_util used ast.literal_eval, socket.gethostbyname,
json.loads/JSONDecodeError, and statistics.mean/median without
importing the modules, resulting in NameError failures. Added
the four stdlib imports and reordered import block to stdlib-
first per PEP8.

Used Claude Code for code generation.
Model used: claude-sonnet-4-6.

Change-Id: I63fd8c03f6fdaba6b86f05d95a98d2c3bb4ab96e
Reviewed-on: https://review.couchbase.org/c/TAF/+/245545
Reviewed-by: Thuan Nguyen <soccon@gmail.com>
Tested-by: Ritesh Agarwal <ritesh.agarwal@couchbase.com>

Author: ritalrw

pytests/aGoodDoctor/fusion/fusion_monitor_util.py

@@ -4,10 +4,15 @@
 Fusion Monitor Util - Core fusion stats monitoring utilities
 '''
 
-from membase.api.rest_client import RestConnection
-from prettytable import PrettyTable
+import ast
+import json
+import socket
+import statistics
 import time
 from datetime import datetime
+
+from membase.api.rest_client import RestConnection
+from prettytable import PrettyTable
 from BucketLib.BucketOperations import BucketHelper
 from couchbase_utils.cb_server_rest_util.fusion.fusion_api import FusionRestAPI