[codex] Restore chat tool-call ID normalization

[i386]

Summary

Restores OpenAI chat tool-call ID normalization on the SDK branch so non-stream /v1/chat/completions responses synthesize missing tool_calls[].id values before clients see them.

Root Cause

The SDK branch dropped the non-stream chat-completion response adapter while retaining the stream adapter. The nightly stability harness then failed the auto non-stream tool-call probe with tool call is missing an id.

Impact

Agent clients using non-stream chat completions can reliably continue after tool calls again, matching the behavior already present on main and the streaming response path.

Validation

• cargo test -p mesh-llm-host-runtime chat_completion_json_normalizer --lib
• cargo test -p mesh-llm-host-runtime relay_normalized_chat_completion_json_adds_missing_tool_call_id --lib
• cargo test -p mesh-llm-host-runtime chat_stream_normalizer --lib
• cargo check -p mesh-llm
• cargo fmt --all -- --check

Full cargo test -p mesh-llm-host-runtime --lib was also run; it failed on two unrelated existing network::nostr::auto_pack_tests display-name expectations.