SUPERSEDED: QUEUE-144 Queue context listener core

[peter-lawrey]

Important

Superseded: do not merge this PR.

The current replacement is #1725, based on the minimal QUEUE-143 Queue integration branch from #1724.

Why this PR cannot simply be retargeted

This branch is descended from the obsolete appender prerequisite #1719, which was itself based on the old full feature/QUEUE-143-RollFileCleanupMain branch. Retargeting this head to the new QUEUE-143 integration branch would make removed cleanup implementation appear in the merge diff.

PR #1725 reapplies the context-listener core patch and merges feature/QUEUE-143-queue-integration-points. Its configured base is an ancestor of its head, and its merge diff is limited to the intended eleven Queue context-listener core files.

Review findings carried to the replacement stack

• The core patch still says the supplied method writer is callback-scoped and implements that restriction. This conflicts with the final Wire contract, under which the writer may be retained for normal use.
• Listener failure before writing currently retries in the same roll context, while the Wire contract says a failed notification is not retried for that context.
• This core layer adds roughly 1,000 lines of production behaviour but its only test class injects a recording lifecycle. The black-box roll, persistence, failure and ownership tests are deferred to #1726. At least a minimal successful-write/once-per-roll test should accompany the core change, or QUEUE-144: Legacy listener source; deliver through #1746 [do not merge] #1725 and Superseded: QUEUE-144 context listener fixtures #1726 must be reviewed and merged as one behavioural unit.

Review and merge should continue on #1725 after those contract differences are reconciled.

[peter-lawrey]

Superseded by the split-base QUEUE-144 stack. Use #1725 instead; it is based on the new minimal QUEUE-143 Queue integration PR (#1724) and does not include the moved roll cleanup implementation.