fix: restore hashability of status enums that define custom __eq__ (hiero-ledger#2470)

Signed-off-by: exploreriii <133720349+exploreriii@users.noreply.github.com>

Author: exploreriii

src/hiero_sdk_python/system/freeze_type.py

@@ -79,3 +79,7 @@ def __eq__(self, other: object) -> bool:
         if isinstance(other, int):
             return self.value == other
         return False
+
+    def __hash__(self) -> int:
+        """Hash by value, consistent with the int-accepting __eq__."""
+        return hash(self.value)

src/hiero_sdk_python/tokens/token_freeze_status.py

@@ -40,3 +40,7 @@ def __eq__(self, other: Any) -> bool:
         if isinstance(other, int):
             return self.value == other
         return False
+
+    def __hash__(self) -> int:
+        """Hash by value, consistent with the int-accepting __eq__."""
+        return hash(self.value)

src/hiero_sdk_python/tokens/token_key_validation.py

@@ -49,3 +49,7 @@ def __eq__(self, other: Any) -> bool:
         if isinstance(other, int):
             return self.value == other
         return False
+
+    def __hash__(self) -> int:
+        """Hash by value, consistent with the int-accepting __eq__."""
+        return hash(self.value)

src/hiero_sdk_python/tokens/token_kyc_status.py

@@ -45,3 +45,7 @@ def __eq__(self, other: Any) -> bool:
         if isinstance(other, int):
             return self.value == other
         return False
+
+    def __hash__(self) -> int:
+        """Hash by value, consistent with the int-accepting __eq__."""
+        return hash(self.value)

src/hiero_sdk_python/tokens/token_pause_status.py

@@ -65,3 +65,7 @@ def __eq__(self, other: Any) -> bool:
         if isinstance(other, int):
             return self.value == other
         return False
+
+    def __hash__(self) -> int:
+        """Hash by value, consistent with the int-accepting __eq__."""
+        return hash(self.value)

tests/unit/status_enum_hashability_test.py

@@ -0,0 +1,57 @@
+"""
+Hashability tests for status enums that define a custom __eq__.
+
+Defining __eq__ in a class body sets __hash__ = None unless __hash__ is
+also defined — which had silently made these Enum members unhashable:
+natural user code like `status in {TokenFreezeStatus.FROZEN}` raised
+TypeError. These tests pin that every such enum is hashable and that its
+hash is consistent with its int-accepting __eq__ (equal objects must hash
+equally, so hash(MEMBER) == hash(MEMBER.value)).
+"""
+
+from __future__ import annotations
+
+import pytest
+
+from hiero_sdk_python.system.freeze_type import FreezeType
+from hiero_sdk_python.tokens.token_freeze_status import TokenFreezeStatus
+from hiero_sdk_python.tokens.token_key_validation import TokenKeyValidation
+from hiero_sdk_python.tokens.token_kyc_status import TokenKycStatus
+from hiero_sdk_python.tokens.token_pause_status import TokenPauseStatus
+
+
+pytestmark = pytest.mark.unit
+
+STATUS_ENUMS = [
+    TokenFreezeStatus,
+    TokenKycStatus,
+    TokenPauseStatus,
+    FreezeType,
+    TokenKeyValidation,
+]
+
+_IDS = [cls.__name__ for cls in STATUS_ENUMS]
+
+
+@pytest.mark.parametrize("enum_cls", STATUS_ENUMS, ids=_IDS)
+def test_members_are_hashable(enum_cls):
+    """Every member must be hashable — usable in sets and as dict keys."""
+    members = list(enum_cls)
+
+    assert set(members) == set(members)
+    assert members[0] in set(members)
+
+    lookup = {member: member.name for member in members}
+    assert lookup[members[0]] == members[0].name
+
+
+@pytest.mark.parametrize("enum_cls", STATUS_ENUMS, ids=_IDS)
+def test_hash_is_consistent_with_int_equality(enum_cls):
+    """__eq__ equates members with their int value, so their hashes must
+    match too — otherwise `member.value in {member}` would be False while
+    `member.value == member` is True."""
+    for member in enum_cls:
+        assert member == member.value
+        assert hash(member) == hash(member.value)
+        assert member.value in {member}
+        assert member in {member.value}