Refactor service classes to match characteristic architecture

- Remove @DataClass from BaseGattService and all concrete services
- Add SIGServiceResolver for consistent resolution pattern
- Add ServiceValidationConfig for validation parameters
- Add __init__ and __post_init__ methods to BaseGattService
- Make _info the single source of truth for uuid, name, summary
- Add get_class_uuid() class method for resolution without instantiation
- Refactor CustomBaseGattService with __init_subclass__ hook
- Add class-level _info attribute support with SIG override validation
- Add UnknownService class in base.py
- Update device.py UnknownService to work with new architecture
- Add is_sig_service() method to BluetoothUUID class
- All 805 tests pass, formatting and linting clean

Co-authored-by: RonanB96 <22995167+RonanB96@users.noreply.github.com>

Author: Copilot

src/bluetooth_sig/device/device.py

@@ -68,6 +68,20 @@ def get_characteristic_info_by_name(self, name: CharacteristicName) -> Any | Non
 class UnknownService(BaseGattService):
     """Generic service for unknown/unsupported UUIDs."""
 
+    def __init__(self, uuid: str | None = None) -> None:
+        """Initialize unknown service with optional UUID."""
+        from ..types import ServiceInfo
+        from ..types.uuid import BluetoothUUID
+
+        # Use provided UUID or a placeholder
+        service_uuid = BluetoothUUID(uuid) if uuid else BluetoothUUID("00001234-0000-1000-8000-00805F9B34FB")
+        info = ServiceInfo(
+            uuid=service_uuid,
+            name=f"Unknown Service ({service_uuid})",
+            description="",
+        )
+        super().__init__(info=info)
+
     @classmethod
     def get_expected_characteristics(cls) -> CharacteristicCollection:
         return {}

src/bluetooth_sig/gatt/services/automation_io.py

@@ -2,14 +2,12 @@
 
 from __future__ import annotations
 
-from dataclasses import dataclass
 from typing import ClassVar
 
 from ..characteristics.registry import CharacteristicName
 from .base import BaseGattService
 
 
-@dataclass
 class AutomationIOService(BaseGattService):
     """Automation IO Service implementation.