[feature] global 'pause' should pause items in the queue from being processed

[feature] global 'pause' should pause items in the queue from being processed

not just from queuing new items (in the case you have a huge queue and you need to pause it!)

Start by tracing where the global pause state is handled and where queued items enter processing; the issue names no files, tests, or entry points. Confirm the current behavior, then verify that enabling the global pause stops existing queued work while preserving the intended resume behavior.

Written by the indexing model from the issue text.