User Story
As a TO, I need to set the actual number of tables available when starting the tournament, so players don't get assigned to unexpectedly high table numbers that I miss until it's too late.
Functional Requirements
Implementation Details
Add pre-start dialog that prompts TO to confirm/set tableCount field. Default to current player count divided by 2 (rounded up). Persist this value on the tournament document for use during all pairing rounds.