Enable logging by default [Java]

Update logs behavior to follow the same opt-in model as enableMetrics:

• Users are considered opted-in when:
  • They call the equivalent of Sentry.logger.*, or
  • They explicitly enable a logging integration.
• Change default: set enable logs to true.
• Audit all logging integrations to ensure:
  • No logs are emitted unless the integration is explicitly enabled.
• Update documentation:
  • Explain new default behavior of enableLogs.
  • Clarify requirement to explicitly enable logging integrations.

首先定位 enableMetrics 和 enableLogs 選項、Sentry.logger.* 呼叫、所有記錄整合以及相關文件。根據 opt-in 要求稽核每個整合，然後更新預設值和文件；當直接使用 logger 以及明確啟用的整合都依指定方式運作，且不會產生非預期的日誌輸出時，即表示完成。