fix: Resolve __eq__ type conflict in CustomFee class (#627) (#672)

Signed-off-by: Rachitb0611 <rachitaroradav@gmail.com>

Author: Rachitb0611

CHANGELOG.md

@@ -32,6 +32,7 @@ This changelog is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.
 
 - Added explicit read permissions to examples.yml (#623)
 - Improved type hinting in `file_append_transaction.py` to resolve 'mypy --strict` errors. ([#495](https://github.com/hiero-ledger/hiero-sdk-python/issues/495))
+- fix: Resolve `__eq__` type conflict in `CustomFee` class (#627)
 
 ### Breaking Changes
 

src/hiero_sdk_python/tokens/custom_fee.py

@@ -60,6 +60,9 @@ def _to_proto(self) -> "CustomFeeProto":  # Changed from _to_protobuf
     def _validate_checksums(self, client: Client) -> None:
         if self.fee_collector_account_id is not None:
             self.fee_collector_account_id.validate_checksum(client)
-            
-    def __eq__(self, other: "CustomFee") -> bool:
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, CustomFee):
+            return NotImplemented
+        
         return self.fee_collector_account_id == other.fee_collector_account_id and self.all_collectors_are_exempt == other.all_collectors_are_exempt