chore(cli): rename encrypted key file (#524)

rename encrypted key file to `priv_validator_key.enc` per request from
@vtiwari-story

issue: none

Author: 0xHansLee

.secrets.baseline

@@ -202,7 +202,7 @@
       {
         "type": "Secret Keyword",
         "filename": "client/config/config.go",
-        "hashed_secret": "572cde2b2a4da9c5a16a48d9a2655a1838c3834a",
+        "hashed_secret": "fa74c684811fc42aa6a61ca3dacd3ea807444e21",
         "is_verified": false,
         "line_number": 34
       }
@@ -974,5 +974,5 @@
       }
     ]
   },
-  "generated_at": "2025-03-19T09:11:15Z"
+  "generated_at": "2025-03-26T14:30:28Z"
 }

client/config/config.go

@@ -31,7 +31,7 @@ const (
 	configDir             = "config"
 	snapshotDataDir       = "snapshots"
 	networkFile           = "network.json"
-	DefaultEncPrivKeyName = "enc_priv_key.json"
+	DefaultEncPrivKeyName = "priv_validator_key.enc"
 
 	DefaultEngineEndpoint     = "http://localhost:8551" // Default host endpoint for the Engine API
 	defaultSnapshotInterval   = 1000                    // Roughly once an hour (given 3s blocks)