deps: upgrade opentelemetry #48

cargo upgrade reports a newer manifest dependency requirement for opentelemetry.

• Cargo.toml / workspace.dependencies: 0.32 → 0.33

Update this dependency everywhere appropriate, including incompatible/major changes. Read the crate's changelog/release notes where useful, adapt code to current APIs and best practices, refresh Cargo.lock, and run the full relevant CI/test suite. Do not skip an update merely because it is transitive, low-risk, or already SemVer-compatible.

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