feat(api): separate private endpoints from public API versioning

PluralKit.API/Controllers/PrivateController.cs

@@ -0,0 +1,35 @@
+using Microsoft.AspNetCore.Mvc;
+
+using Newtonsoft.Json.Linq;
+
+using PluralKit.Core;
+
+namespace PluralKit.API;
+
+// Internal API definitions
+// I would prefer if you do not use any of these APIs in your own integrations.
+// It is unstable and subject to change at any time (which is why it's not versioned)
+
+// If for some reason you do need access to something defined here,
+// let us know in #api-support on the support server (https://discord.com/invite/PczBt78) and I'll see if it can be made public
+
+[ApiController]
+[Route("private")]
+public class PrivateController: PKControllerBase
+{
+    public PrivateController(IServiceProvider svc) : base(svc) { }
+
+    [HttpGet("meta")]
+    public async Task<ActionResult<JObject>> Meta()
+    {
+        var shards = await _repo.GetShards();
+        var stats = await _repo.GetStats();
+
+        var o = new JObject();
+        o.Add("shards", shards.ToJSON());
+        o.Add("stats", stats.ToJson());
+        o.Add("version", BuildInfoService.Version);
+
+        return Ok(o);
+    }
+}