feat: utilize IHttpClientFactory for improved HTTP client management

- Replaced direct `HttpClient` dependencies with `IHttpClientFactory` in `GithubService`, `ForgejoService`, and `ReleaseAssetDownloadService`.
- Added DI-configured HTTP client registrations for GitHub, Forgejo, and asset downloads in `Program.cs`.
- Consolidated HTTP client setup to enhance maintainability, configurability, and resource lifecycle management.

Program.cs

@@ -8,27 +8,32 @@ var builder = Host.CreateApplicationBuilder(args);
 var config = AppConfigLoader.LoadConfigFromEnv();
 builder.Services.AddSingleton(config);
 
-var repositoryConfig = await RepoConfigLoader.LoadConfigAsync(
-    config.RepositoryConfigFilePath);
+var repositoryConfig = await RepoConfigLoader.LoadConfigAsync(config.RepositoryConfigFilePath);
 builder.Services.AddSingleton(repositoryConfig);
 
-builder.Services.AddHttpClient<GithubService>(client =>
+builder.Services.AddHttpClient("github", client =>
 {
     client.BaseAddress = new Uri("https://api.github.com/");
     client.DefaultRequestHeaders.UserAgent.ParseAdd("ForgejoReleaseSync");
     client.DefaultRequestHeaders.Accept.ParseAdd("application/vnd.github+json");
 });
 
-builder.Services.AddHttpClient<ForgejoService>(client =>
+builder.Services.AddHttpClient("forgejo", client =>
+{
+    client.BaseAddress = new Uri(config.ForgejoInstacne.TrimEnd('/') + "/");
+    client.DefaultRequestHeaders.UserAgent.ParseAdd("ForgejoReleaseSync");
+    client.DefaultRequestHeaders.Authorization =
+        new AuthenticationHeaderValue("token", config.ForgejoToken);
+});
+
+builder.Services.AddHttpClient("asset-download", client =>
 {
-    client.BaseAddress = new Uri(config.ForgejoInstacne);
     client.DefaultRequestHeaders.UserAgent.ParseAdd("ForgejoReleaseSync");
-    client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("token", config.ForgejoToken);
 });
 
-builder.Services.AddSingleton<ReleaseAssetDownloadService>();
 builder.Services.AddSingleton<GithubService>();
 builder.Services.AddSingleton<ForgejoService>();
+builder.Services.AddSingleton<ReleaseAssetDownloadService>();
 builder.Services.AddSingleton<SyncService>();
 
 var app = builder.Build();