Add Flutter STT configuration validation model

Author: DevDesai444

sdk/runanywhere-flutter/packages/runanywhere/lib/features/stt/stt_configuration.dart

@@ -0,0 +1,46 @@
+import 'package:runanywhere/core/protocols/component/component_configuration.dart';
+import 'package:runanywhere/core/types/model_types.dart';
+import 'package:runanywhere/foundation/error_types/sdk_error.dart';
+
+/// Configuration for the STT component.
+///
+/// Mirrors the validation contract used by the Swift and Kotlin SDKs so
+/// invalid parameters fail in Dart before crossing the FFI boundary.
+class STTConfiguration implements ComponentConfiguration {
+  final String? modelId;
+  final InferenceFramework? preferredFramework;
+  final String language;
+  final int sampleRate;
+  final bool enablePunctuation;
+  final bool enableDiarization;
+  final List<String> vocabularyList;
+  final int maxAlternatives;
+  final bool enableTimestamps;
+
+  const STTConfiguration({
+    this.modelId,
+    this.preferredFramework,
+    this.language = 'en-US',
+    this.sampleRate = 16000,
+    this.enablePunctuation = true,
+    this.enableDiarization = false,
+    this.vocabularyList = const <String>[],
+    this.maxAlternatives = 1,
+    this.enableTimestamps = true,
+  });
+
+  @override
+  void validate() {
+    if (sampleRate <= 0 || sampleRate > 48000) {
+      throw SDKError.validationFailed(
+        'Sample rate must be between 1 and 48000 Hz',
+      );
+    }
+
+    if (maxAlternatives <= 0 || maxAlternatives > 10) {
+      throw SDKError.validationFailed(
+        'Max alternatives must be between 1 and 10',
+      );
+    }
+  }
+}