feat(backend): add pride flag models

Foxnouns.Backend/Controllers/FlagsController.cs

@@ -0,0 +1,28 @@
+using Foxnouns.Backend.Database;
+using Foxnouns.Backend.Middleware;
+using Foxnouns.Backend.Services;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.EntityFrameworkCore;
+
+namespace Foxnouns.Backend.Controllers;
+
+[Route("/api/v2/users/@me/flags")]
+public class FlagsController(DatabaseContext db, UserRendererService userRenderer) : ApiControllerBase
+{
+    [HttpGet]
+    [Authorize("identify")]
+    [ProducesResponseType<IEnumerable<PrideFlagResponse>>(statusCode: StatusCodes.Status200OK)]
+    public async Task<IActionResult> GetFlagsAsync(CancellationToken ct = default)
+    {
+        var flags = await db.PrideFlags.Where(f => f.UserId == CurrentUser!.Id).ToListAsync(ct);
+
+        return Ok(flags.Select(f => new PrideFlagResponse(
+            f.Id, userRenderer.ImageUrlFor(f), f.Name, f.Description)));
+    }
+
+    private record PrideFlagResponse(
+        Snowflake Id,
+        string ImageUrl,
+        string Name,
+        string? Description);
+}