Place Task logger in context earlier

[cicdw]

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• adds new tests (if appropriate)
• updates CHANGELOG.md (if appropriate)
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What does this PR change?

This PR adds the Task logger in context within initialize_run instead of only during get_task_run_state. This ensures that the Task logger is available during every single pipeline step, including during cache validation.

Why is this PR important?

See #1509 for an excellent description of why having a properly populated context object is important.

Closes #1509