Add comprehensive e2e tests for sessions and devices with 100% coverage

- Add tests for me.sessions (list, revoke, revokeAll)
- Add tests for me.devices (getInfo, trust, listTrusted, untrust, revokeAll)
- Refactor router to use nested namespaces (me.sessions.*, me.devices.*)
- Add createUserAPIContext helper that returns { context, token }
- Add createDevice helper for device tests
- Update createSession to return { token, sessionId }

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

db/schema.sql

@@ -1,4 +1,4 @@
-\restrict KXTb98GlQCetYfS0eRd7LzGbBIiTxg53JFiqnSln3PIIhE3DD10jqFdLLY3AKZu
+\restrict JcXyipc16dugUGJvd2oDJgA4cUi3A29rdzMF11XH6GPR94bG05YyvDzwhuyfGSd
 
 -- Dumped from database version 17.7
 -- Dumped by pg_dump version 17.7
@@ -1084,7 +1084,7 @@ ALTER TABLE ONLY public.user_devices
 -- PostgreSQL database dump complete
 --
 
-\unrestrict KXTb98GlQCetYfS0eRd7LzGbBIiTxg53JFiqnSln3PIIhE3DD10jqFdLLY3AKZu
+\unrestrict JcXyipc16dugUGJvd2oDJgA4cUi3A29rdzMF11XH6GPR94bG05YyvDzwhuyfGSd
 
 
 --