chore(deps): bump thiserror from 1.0.69 to 2.0.18

Bumps [thiserror](https://github.com/dtolnay/thiserror) from 1.0.69 to 2.0.18.
- [Release notes](https://github.com/dtolnay/thiserror/releases)
- [Commits](dtolnay/thiserror@1.0.69...2.0.18)

---
updated-dependencies:
- dependency-name: thiserror
  dependency-version: 2.0.18
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Cargo.lock

@@ -34,7 +34,7 @@ hyper-util = { workspace = true, features = ["tokio"] }
 
 # Utilities
 tracing = { workspace = true }
-thiserror = "1.0"
+thiserror = "2.0"
 uuid = { workspace = true, features = ["v4"] }
 
 # For MCP tool invocation proxy (calls back into the main HTTP API over localhost)