feat: game lobby service

lobby/docs/README.md

@@ -0,0 +1,18 @@
+# Game Lobby Docs
+
+This directory keeps service-local documentation that is too detailed for the
+root architecture documents and too diagram-heavy for the module README.
+
+Sections:
+- [Runtime and components](runtime.md)
+- [Flows](flows.md)
+- [Operator runbook](runbook.md)
+- [Configuration and contract examples](examples.md)
+
+Primary references:
+- `../README.md` — service scope, contracts, configuration, observability.
+- `../api/public-openapi.yaml` — public REST contract.
+- `../api/internal-openapi.yaml` — internal REST contract.
+- `../../ARCHITECTURE.md` — workspace architecture (§7 Game Lobby).
+- `../../notification/README.md` — notification intent catalog.
+- `../../user/README.md` — User Service eligibility surface.