feat(backend): add communication, tester, admin and middleman modules

Implement step 17 modules: threads/messages, notifications with automation (submission.created, idea.created, grant_call.opened), innovation test feedback, admin panel (submissions, verify, metrics, grant call status), Middleman adaptation and partnerships. Split multi-type files into one type per file and replace object-valued dictionaries with string-valued maps in data contracts (migrations 0006/0007).

backend/Controllers/MiddlemanController.cs

@@ -0,0 +1,32 @@
+using Asp.Versioning;
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Mvc;
+using TarninaHub.Application.Abstractions;
+using TarninaHub.Application.Dtos;
+using TarninaHub.Application.Security;
+
+namespace TarninaHub.Controllers;
+
+[ApiController]
+[ApiVersion("1.0")]
+[Route("api/middleman")]
+[Authorize(Policy = Policies.JstOrAbove)]
+public class MiddlemanController : ControllerBase
+{
+    private readonly IMiddlemanService _middleman;
+
+    public MiddlemanController(IMiddlemanService middleman)
+    {
+        _middleman = middleman;
+    }
+
+    [HttpPost("adapt")]
+    public async Task<ActionResult<MiddlemanResponse>> Adapt(
+        MiddlemanRequest request,
+        CancellationToken cancellationToken)
+    {
+        var response = await _middleman.AdaptAsync(request, cancellationToken);
+
+        return response is null ? NotFound() : Ok(response);
+    }
+}