Move old migrations (20260109 through 20260817) to _archived/ and add a
single consolidated migration (20260818_024510). Update the migrations
index to reference only the new migration.
Add migration 20260816_213455 covering the Tickets collection plus all schema drift accumulated since 20260109 (banking, market, game vehicles/NPCs, attendance, enum extensions).
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
