fix: Send task_id for multi-turn tasks

[kthota-g]

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[adk-bot]

Response from ADK Triaging Agent

Hello @kthota-g, thank you for creating this PR!

Could you please fill out the PR template? Specifically, we need:

• A link to an existing issue or a description of the change.
• A testing plan to help reviewers understand how to verify your changes.

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Thanks!