feat: correlate streamed tool lifecycle events

[efecnc]

Summary

• propagate the provider tool call ID through started and finished telemetry
• expose one correlation ID across API stream start, progress, and finish events
• include correlation IDs in structured diagnostics while preserving backward-compatible deserialization

Validation

• cargo check
• cargo test --lib
• cargo clippy --all-targets -- -D warnings
• git diff --check

[amazon-q-developer]

The changes in this PR correctly add tool_call_id tracking across the telemetry system. The implementation properly handles the optional field with Option<String>, uses #[serde(default, skip_serializing_if = "Option::is_none")] for backward compatibility, and threads the ID through all relevant telemetry events and logging functions. The test coverage confirms the correlation ID functionality works as expected. No blocking issues identified.

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