Fix three bugs in codebase

lib/extensions/uri.dart

@@ -19,6 +19,13 @@ extension AddParameters on Uri {
       newParameters[key] = value;
     });
 
-    return buildUrlString(paramUrl, newParameters).toUri();
+    String finalUrl = buildUrlString(paramUrl, newParameters);
+
+    // Preserve the fragment if it exists
+    if (fragment.isNotEmpty) {
+      finalUrl += '#$fragment';
+    }
+
+    return finalUrl.toUri();
   }
 }

lib/http/intercepted_client.dart

@@ -293,7 +293,7 @@ class InterceptedClient extends BaseClient {
         _retryCount += 1;
         await Future.delayed(retryPolicy!
             .delayRetryAttemptOnResponse(retryAttempt: _retryCount));
-        return _attemptRequest(request);
+        return _attemptRequest(request, isStream: isStream);
       }
     } on Exception catch (error) {
       if (retryPolicy != null &&
@@ -302,7 +302,7 @@ class InterceptedClient extends BaseClient {
         _retryCount += 1;
         await Future.delayed(retryPolicy!
             .delayRetryAttemptOnException(retryAttempt: _retryCount));
-        return _attemptRequest(request);
+        return _attemptRequest(request, isStream: isStream);
       } else {
         rethrow;
       }

lib/models/retry_policy.dart

@@ -45,7 +45,7 @@ abstract class RetryPolicy {
   FutureOr<bool> shouldAttemptRetryOnResponse(BaseResponse response) => false;
 
   /// Number of maximum request attempts that can be retried.
-  final int maxRetryAttempts = 1;
+  int get maxRetryAttempts => 1;
 
   Duration delayRetryAttemptOnException({required int retryAttempt}) =>
       Duration.zero;

test/models/retry_policy_test.dart

@@ -12,6 +12,14 @@ main() {
     test("defaults to 1", () {
       expect(testObject.maxRetryAttempts, 1);
     });
+
+    test("can be overridden", () {
+      testObject = TestRetryPolicy(
+        maxRetryAttempts: 5,
+      );
+
+      expect(testObject.maxRetryAttempts, 5);
+    });
   });
 
   group("delayRetryAttemptOnException", () {
@@ -60,4 +68,13 @@ main() {
   });
 }
 
-class TestRetryPolicy extends RetryPolicy {}
+class TestRetryPolicy extends RetryPolicy {
+  TestRetryPolicy({
+    int maxRetryAttempts = 1,
+  }) : internalMaxRetryAttempts = maxRetryAttempts;
+
+  final int internalMaxRetryAttempts;
+
+  @override
+  int get maxRetryAttempts => internalMaxRetryAttempts;
+}