test: fix get posts conflicting

Xunit v3 isn't running tests in order, where we were previously assuming tests would run in the order they're defined, and it's easier to just narrow the get-all endpoint test to use a querystring search instead of tackling test order issues.

Author: JasonWeinzierl

tests/BHS.Api.IntegrationTests/EndpointTests.cs

@@ -83,7 +83,7 @@ public async Task Banners_GetCurrent()
     [Fact]
     public async Task Blog_GetPosts()
     {
-        var posts = await _httpClient.GetFromJsonAsync<IEnumerable<PostPreview>>("/api/blog/posts", TestContext.Current.CancellationToken);
+        var posts = await _httpClient.GetFromJsonAsync<IEnumerable<PostPreview>>($"/api/blog/posts?q={Random.Shared.Next()}", TestContext.Current.CancellationToken);
 
         Assert.NotNull(posts);
         Assert.Empty(posts);