fix(server): index & gc queue & llm compatibility (#15528)

fix #15523
fix #15526

#### PR Dependency Tree


* **PR #15528** 👈

This tree was auto-generated by
[Charcoal](https://github.com/danerwilliams/charcoal)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## 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.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Cargo.lock

@@ -2956,9 +2956,9 @@ dependencies = [
 
 [[package]]
 name = "generator"
-version = "0.8.8"
+version = "0.8.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "52f04ae4152da20c76fe800fa48659201d5cf627c5149ca0b707b69d7eef6cf9"
+checksum = "b3b854b0e584ead1a33f18b2fcad7cf7be18b3875c78816b753639aa501513ae"
 dependencies = [
  "cc",
  "cfg-if",
@@ -2966,7 +2966,7 @@ dependencies = [
  "log",
  "rustversion",
  "windows-link 0.2.1",
- "windows-result 0.4.1",
+ "windows-result 0.3.4",
 ]
 
 [[package]]
@@ -4758,9 +4758,9 @@ dependencies = [
 
 [[package]]
 name = "llm_adapter"
-version = "0.2.21"
+version = "0.2.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "02c6b4fa5178b8183331a7d51e8f7ece5421ecb966d3431f3d9ce3c724c6fcc0"
+checksum = "bd18d17c60b800981d83224309ff9ce6b4093ae12929f2baad77dd5208383bdc"
 dependencies = [
  "base64",
  "jsonschema",