Refactor service discovery to always perform fresh discovery, removing cached services check

Signed-off-by: Tony <tonylu@tony-cloud.com>

darwin/universal_ble/Sources/universal_ble/UniversalBleAsyncServiceDiscovery.swift

@@ -35,12 +35,11 @@ class UniversalBleAsyncServiceDiscovery: NSObject {
         }
         isDiscoveryInProgress = true
 
-        // Check if services are already cached
-        if let cachedServices = peripheral.services, !cachedServices.isEmpty {
-            handleServicesDiscovered(cachedServices)
-        } else {
-            peripheral.discoverServices(nil)
-        }
+        // A peripheral can keep CoreBluetooth's previous GATT view across a
+        // firmware update. UniversalBle.discoverServices is the explicit fresh
+        // discovery API; callers that want cached data use BleDevice's
+        // preferCached path instead.
+        peripheral.discoverServices(nil)
     }
 
     /// Cleans up discovery state
@@ -64,13 +63,7 @@ class UniversalBleAsyncServiceDiscovery: NSObject {
 
         // Discover characteristics for each service
         for service in services {
-            if let cachedChar = service.characteristics, !cachedChar.isEmpty {
-                // Characteristics already cached, process them
-                processCharacteristicsForService(service)
-            } else {
-                // Need to discover characteristics
-                peripheral.discoverCharacteristics(nil, for: service)
-            }
+            peripheral.discoverCharacteristics(nil, for: service)
         }
     }