Remove old pubsub#662

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nuclearcat wants to merge 12 commits intokernelci:mainfrom

nuclearcat:remote-old-pubsub

Commits on Feb 2, 2026

Docs update to remove Pub/Sub guidance/diagrams; clarify REST-only submission and any migration notes.
nuclearcat
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Remove Pub/Sub dependencies and cloud deployment scripts/sections (cloud/pubsub.sh, scheduler jobs, IAM roles), plus requirements/setup cleanup
nuclearcat
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Remove Pub/Sub runtime code paths (kcidb.mq module, main.py Pub/Sub handlers, Client project_id/topic_name logic), update tests and public API docs.
nuclearcat
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Cleanup follow-ups (delete dead env vars, config references, any unused helpers) and run targeted tests if available
nuclearcat
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cloud: Delete more google cloud specific code
nuclearcat
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Fix linter issues
nuclearcat
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