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/Application/Matchmaking/LlmPrompt.cs

@@ -0,0 +1,4 @@
+namespace TarninaHub.Application.Matchmaking;
+
+
+public sealed record LlmPrompt(string System, string User);

backend/Application/Matchmaking/MatchPromptBuilder.cs

@@ -1,6 +1,5 @@
 namespace TarninaHub.Application.Matchmaking;
 
-public sealed record LlmPrompt(string System, string User);
 
 public static class MatchPromptBuilder
 {

backend/Application/Matchmaking/RankedItem.cs

@@ -0,0 +1,4 @@
+namespace TarninaHub.Application.Matchmaking;
+
+
+public sealed record RankedItem<T>(T Item, double Score);

backend/Application/Matchmaking/SemanticRanker.cs

@@ -1,6 +1,5 @@
 namespace TarninaHub.Application.Matchmaking;
 
-public sealed record RankedItem<T>(T Item, double Score);
 
 public static class SemanticRanker
 {