refactor: remove ConfigValue from public API

No SDK method returned or accepted ConfigValue — it was a dead export.
Removed the class from types.py, the import and __all__ entry in
__init__.py, and the corresponding test.

Closes #73

Co-Authored-By: Claude <noreply@anthropic.com>

Author: zeevdr

sdk/src/opendecree/__init__.py

@@ -29,7 +29,7 @@
     UnavailableError,
     UnimplementedError,
 )
-from opendecree.types import Change, ConfigValue, FieldUpdate, ServerVersion
+from opendecree.types import Change, FieldUpdate, ServerVersion
 from opendecree.watcher import ConfigWatcher, WatchedField
 
 __all__ = [
@@ -44,7 +44,6 @@
     "Change",
     "ChecksumMismatchError",
     "ConfigClient",
-    "ConfigValue",
     "ConfigWatcher",
     "DecreeError",
     "FieldUpdate",

sdk/src/opendecree/types.py

@@ -8,23 +8,6 @@
 from dataclasses import dataclass
 
 
-@dataclass(frozen=True, slots=True)
-class ConfigValue:
-    """A single configuration value.
-
-    Attributes:
-        field_path: Dot-separated field path (e.g., ``"payments.fee"``).
-        value: The raw string value.
-        checksum: xxHash checksum of the value.
-        description: Optional description set when the value was written.
-    """
-
-    field_path: str
-    value: str
-    checksum: str
-    description: str = ""
-
-
 @dataclass(frozen=True, slots=True)
 class Change:
     """A configuration change event from a subscription.

sdk/tests/test_types.py

@@ -1,14 +1,6 @@
 """Tests for public data types."""
 
-from opendecree.types import Change, ConfigValue, ServerVersion
-
-
-def test_config_value_frozen():
-    cv = ConfigValue(field_path="a.b", value="1", checksum="abc")
-    assert cv.field_path == "a.b"
-    assert cv.value == "1"
-    assert cv.checksum == "abc"
-    assert cv.description == ""
+from opendecree.types import Change, ServerVersion
 
 
 def test_change():