chore: establish local platform baseline

migrations/000032_device_rtc_renewal_capability.up.sql

@@ -0,0 +1,9 @@
+BEGIN;
+
+ALTER TABLE conversation
+    ADD COLUMN rtc_credential_renewal_supported boolean NOT NULL DEFAULT false;
+
+COMMENT ON COLUMN conversation.rtc_credential_renewal_supported IS
+    'Frozen device capability. Only true allows renew_rtc_credential heartbeat actions; omitted v2 capability remains legacy-compatible.';
+
+COMMIT;