chore: move the go code into a subfolder

apps/api/internal/query/saml_request_by_id.sql

@@ -0,0 +1,11 @@
+select
+    id,
+    creation_date,
+    login_client,
+    issuer,
+    acs,
+    relay_state,
+    binding
+from projections.saml_requests
+where id = $1 and instance_id = $2
+limit 1;