fix#15523fix#15526
#### PR Dependency Tree
* **PR #15528** 👈
This tree was auto-generated by
[Charcoal](https://github.com/danerwilliams/charcoal)
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## Summary by CodeRabbit
- **Bug Fixes**
- Improved search generation cleanup, provider error reporting, and
reconciliation reliability.
- Retired search resources are cleaned up safely, including after
credential changes.
- Prompt size checks now ignore tool parameters and provide clearer
errors.
- Reserved documents are protected from accidental cleanup, and
malformed identifiers are rejected.
- **Configuration**
- Managed Copilot profiles require explicit, non-duplicated model
assignments.
- Improved managed provider profile migration.
- **Performance & Reliability**
- Reduced unnecessary search-history cleanup and adjusted
consistency-check intervals.
- Failed reconciliation jobs stop after one attempt and are removed
automatically.
- **Data Updates**
- Updated legacy AI session prompt names to current labels.
- Improved cloud load-balancer health-check configuration.
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