OPC # 0006: OPC Git Trunk-Based management

Co-authored-by: Copilot <copilot@github.com>

ControlPlane.Api/Services/ReleaseService.cs

@@ -17,6 +17,7 @@ public class ReleaseService(
     IConfiguration config,
     TenantRegistryService registry,
     BuildHistoryService history,
+    PromotionService promotions,
     ILogger<ReleaseService> logger)
 {
     private static readonly SemaphoreSlim _lock = new(1, 1);
@@ -182,6 +183,11 @@ public class ReleaseService(
         }
         finally
         {
+            // Stamp OPC ticket numbers from recent commits on the target branch.
+            var branch = targetEnv switch { "fdev" => "develop", "staging" => "staging", "uat" => "uat", _ => "main" };
+            try   { record.OpcNumbers = await promotions.ExtractOpcNumbersAsync("Clarity", branch, 50, ct); }
+            catch { /* git not configured — continue without OPC stamp */ }
+
             await history.UpdateReleaseAsync(record);
             _lock.Release();
         }