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/Infrastructure/Persistence/ApplicationService.cs

@@ -66,7 +66,7 @@ public sealed class ApplicationService : IApplicationService
                 ["grantId"] = grantId,
                 ["ideaTable"] = ideaTable,
                 ["ideaId"] = ideaIdPart,
-                ["content"] = ToStorageContent(request.Content),
+                ["content"] = request.Content ?? new Dictionary<string, string?>(),
             },
             cancellationToken);
         response.EnsureAllOks();
@@ -113,24 +113,7 @@ public sealed class ApplicationService : IApplicationService
         row.Id,
         row.GrantCall,
         row.Idea,
-        row.Content.ToDictionary(pair => pair.Key, pair => (object?)pair.Value),
+        row.Content,
         row.Status,
         row.CreatedAt);
-
-    private static Dictionary<string, string?> ToStorageContent(IReadOnlyDictionary<string, object?>? content)
-    {
-        var result = new Dictionary<string, string?>();
-
-        if (content is null)
-        {
-            return result;
-        }
-
-        foreach (var (key, value) in content)
-        {
-            result[key] = value?.ToString();
-        }
-
-        return result;
-    }
 }