Make scheduler tick logs opt-in with debug option

[QuenumGerald]

Motivation

• Avoid noisy scheduler output by making the internal tick() logs optional so they are only printed when explicitly requested.

Description

• Added a debug?: boolean field to BlazeJobOptions, stored as this.debug on the BlazeJob instance, and wrapped the tick() console logs to run only when debug is true; updated README.md to document the new option (src/index.ts, README.md).

Testing

• Ran npm run build which invoked tsc and completed successfully.

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Codex Task