Identify all cross-transactions between `users` and `namespaces`

What does this MR do and why?

Related issue: #415199 (closed)

Identify all cross-transactions between users and namespaces

1. Fixes cross-transaction issues arising from specs only
2. Marked cross-transaction issues to be fixed later in &11389 (closed)
3. Changed cross-transaction query analyzer to ignore build factory bot calls

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