perimeter tag correct and add "is_production" tag

[vinay79n]

feat:

• updated "perimeter" tag, now we directly fetch the flows' perimeter from outerbounds' env vars [os.environ.get('OB_CURRENT_PERIMETER') or os.environ.get('OBP_PERIMETER')]
• and added "is_production" flag in get_select_dev_query_tags() function tags dict

[Copilot]

Pull Request Overview

This PR updates the tagging mechanism for Metaflow audit logs by changing how the perimeter is determined and adding production status tracking. Instead of deriving perimeter from the is_production flag, it now reads directly from Outerbounds environment variables, and explicitly includes the is_production flag as a separate tag.

Key Changes:

• Perimeter tag now reads from OB_CURRENT_PERIMETER or OBP_PERIMETER environment variables
• Added explicit is_production tag to track deployment production status

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