Decides which events should be produced in response to Genesis commands.

The Fact.Genesis.Decider is responsible for taking commands related to database creation (currently only Fact.Genesis.Command.CreateDatabase.V1) and producing the corresponding events (currently only Fact.Genesis.Event.DatabaseCreated.V1) if all validation passes.

This decider handles:

• Resolving the database name and path
• Verifying the target directory exists and is empty
• Building the full configuration for all components (event ids, schemas, ledger, index, lock, record, and storage files)
• Computing derived values like record filename lengths and reader paddings
• Generating unique database IDs and capturing system compatibility (Elixir, Erlang/OTP, OS, Fact version)