fix: pause_key snake case

Author: exploreriii

src/hiero_sdk_python/tokens/token_create_transaction.py

@@ -400,7 +400,7 @@ def build_transaction_body(self):
             supplyKey=supply_key_proto,
             freezeKey=freeze_key_proto,
             wipeKey=wipe_key_proto,
-            pauseKey=pause_key_proto
+            pause_key=pause_key_proto
         )
         # Build the base transaction body and attach the token creation details
         transaction_body = self.build_base_transaction_body()

src/hiero_sdk_python/tokens/token_info.py

@@ -75,8 +75,8 @@ def set_auto_renew_period(self, autoRenewPeriod: Duration):
     def set_expiry(self, expiry: Timestamp):
         self.expiry = expiry
 
-    def set_pause_key(self, pauseKey: PublicKey):
-        self.pause_key = pauseKey
+    def set_pause_key(self, pause_key: PublicKey):
+        self.pause_key = pause_key
 
     def set_pause_status(self, pauseStatus: TokenPauseStatus):
         self.pause_status = pauseStatus

tests/unit/test_token_create_transaction.py

@@ -80,6 +80,7 @@ def test_build_transaction_body_without_key(mock_account_ids):
     assert not transaction_body.tokenCreation.HasField("adminKey")
     assert not transaction_body.tokenCreation.HasField("supplyKey")
     assert not transaction_body.tokenCreation.HasField("freezeKey")
+    assert not transaction_body.tokenCreation.HasField("pause_key")
 
 # This test uses fixture mock_account_ids as parameter
 def test_build_transaction_body(mock_account_ids):