fix(grpc): Address P1 code review issues - restore error_details export and fix deprecated Server constructor

ISSUE 1 - Missing error_details Export:
- Re-export generated/google/rpc/error_details.pb.dart from lib/grpc.dart
- Prevents breaking downstream code expecting BadRequest and other google.rpc error messages
- Addresses: #8 (comment)

ISSUE 2 - Deprecated Server Constructor Argument Order:
- Fix argument forwarding in deprecated Server(...) constructor
- Insert empty serverInterceptors list in super() call to maintain correct parameter positions
- Prevents codecRegistry/errorHandler from being passed to wrong slots
- Maintains backwards compatibility for existing code using deprecated constructor
- Addresses: #8 (comment)

VERIFICATION:
- dart analyze: ✅ No issues
- dart test: ✅ All 172 tests passing (+3 skipped)
- dart format: ✅ Properly formatted
- No breaking changes - fully backwards compatible

RELATED:
- PR: #8
- Codex review comments resolved

Author: tsavo-at-pieces

lib/grpc.dart

@@ -39,6 +39,7 @@ export 'src/client/options.dart'
 export 'src/client/proxy.dart' show Proxy;
 export 'src/client/transport/http2_credentials.dart'
     show BadCertificateHandler, allowBadCertificates, ChannelCredentials;
+export 'src/generated/google/rpc/error_details.pb.dart';
 export 'src/server/call.dart' show ServiceCall;
 export 'src/server/interceptor.dart'
     show Interceptor, ServerInterceptor, ServerStreamingInvoker;

lib/src/server/server.dart

@@ -200,12 +200,21 @@ class Server extends ConnectionServer {
   /// Create a server for the given [services].
   @Deprecated('use Server.create() instead')
   Server(
-    super.services, [
-    super.interceptors,
-    super.codecRegistry,
-    super.errorHandler,
-    super.keepAlive,
-  ]);
+    List<Service> services, [
+    List<Interceptor> interceptors = const <Interceptor>[],
+    CodecRegistry? codecRegistry,
+    GrpcErrorHandler? errorHandler,
+    ServerKeepAliveOptions keepAlive = const ServerKeepAliveOptions(),
+  ]) : super(
+         services,
+         interceptors,
+         const <
+           ServerInterceptor
+         >[], // Empty list for new serverInterceptors parameter
+         codecRegistry,
+         errorHandler,
+         keepAlive,
+       );
 
   /// Create a server for the given [services].
   Server.create({