fix(handlers): update executeDelegation calls in integration tests

The executeDelegation signature changed from 5 params to 4 params
(removed ctx param). Update all 5 integration test calls to match
the new signature and suppress the now-unused ctx variable.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

workspace-server/internal/handlers/delegation_executor_integration_test.go

@@ -303,7 +303,8 @@ func TestIntegration_ExecuteDelegation_DeliveryConfirmedProxyError_TreatsAsSucce
 
 	start := time.Now()
 	runWithTimeout(t, 30*time.Second, func(ctx context.Context) {
-		dh.executeDelegation(ctx, testSourceID, testTargetID, testDelegationID, a2aBody)
+		_ = ctx // ctx unused: executeDelegation manages its own 30-min timeout
+		dh.executeDelegation(testSourceID, testTargetID, testDelegationID, a2aBody)
 	})
 	t.Logf("executeDelegation took %v", time.Since(start))
 
@@ -355,7 +356,8 @@ func TestIntegration_ExecuteDelegation_ProxyErrorNon2xx_RemainsFailed(t *testing
 	})
 	start := time.Now()
 	runWithTimeout(t, 30*time.Second, func(ctx context.Context) {
-		dh.executeDelegation(ctx, testSourceID, testTargetID, testDelegationID, a2aBody)
+		_ = ctx // ctx unused: executeDelegation manages its own 30-min timeout
+		dh.executeDelegation(testSourceID, testTargetID, testDelegationID, a2aBody)
 	})
 	t.Logf("executeDelegation took %v", time.Since(start))
 
@@ -404,7 +406,8 @@ func TestIntegration_ExecuteDelegation_ProxyErrorEmptyBody_RemainsFailed(t *test
 	})
 	start := time.Now()
 	runWithTimeout(t, 30*time.Second, func(ctx context.Context) {
-		dh.executeDelegation(ctx, testSourceID, testTargetID, testDelegationID, a2aBody)
+		_ = ctx // ctx unused: executeDelegation manages its own 30-min timeout
+		dh.executeDelegation(testSourceID, testTargetID, testDelegationID, a2aBody)
 	})
 	t.Logf("executeDelegation took %v", time.Since(start))
 
@@ -452,7 +455,8 @@ func TestIntegration_ExecuteDelegation_CleanProxyResponse_Unchanged(t *testing.T
 	})
 	start := time.Now()
 	runWithTimeout(t, 30*time.Second, func(ctx context.Context) {
-		dh.executeDelegation(ctx, testSourceID, testTargetID, testDelegationID, a2aBody)
+		_ = ctx // ctx unused: executeDelegation manages its own 30-min timeout
+		dh.executeDelegation(testSourceID, testTargetID, testDelegationID, a2aBody)
 	})
 	t.Logf("executeDelegation took %v", time.Since(start))
 
@@ -497,7 +501,8 @@ func TestIntegration_ExecuteDelegation_RedisDown_FallsBackToDB(t *testing.T) {
 	})
 	start := time.Now()
 	runWithTimeout(t, 30*time.Second, func(ctx context.Context) {
-		dh.executeDelegation(ctx, testSourceID, testTargetID, testDelegationID, a2aBody)
+		_ = ctx // ctx unused: executeDelegation manages its own 30-min timeout
+		dh.executeDelegation(testSourceID, testTargetID, testDelegationID, a2aBody)
 	})
 	t.Logf("executeDelegation took %v", time.Since(start))