Ingest node_repl stderr telemetry spans

[charley-openai]

Summary

• add node_repl/js MCP _meta trace context for stderr span telemetry
• parse @codex-telemetry stderr lines from local stdio MCP servers and route node_repl telemetry into OTel
• reconstruct sanitized Browser Use/node_repl spans with explicit trace/span/parent ids so emitted child spans nest under node_repl.js
• keep traceparent fallback for older records and add js_repl tool-call span coverage

Tests

• cargo test -p codex-otel stderr_span_telemetry
• cargo test -p codex-rmcp-client stderr_telemetry_parser
• cargo test -p codex-core mcp_tool_call
• cargo test -p codex-core otel_stderr_spans
• cargo test -p codex-mcp
• just fix -p codex-otel
• just fix -p codex-rmcp-client -p codex-mcp -p codex-core
• just fmt
• git diff --check

[chatgpt-codex-connector]

Summary

• Updated stderr span telemetry schema-version parsing to accept numeric strings for v by reusing the alias-aware numeric parser (required_u64_alias), while keeping unsupported versions rejected. codex-rs/otel/src/stderr_span_telemetry.rsL92-L95
• Expanded accepted timestamp field aliases to include additional camelCase variants (startUnixNanos / startUnixNano and endUnixNanos / endUnixNano) for better emitter compatibility. codex-rs/otel/src/stderr_span_telemetry.rsL110-L133
• Added a focused unit test proving string schema version + camelCase timestamp alias parsing reconstructs the expected telemetry record. codex-rs/otel/src/stderr_span_telemetry.rsL325-L348

Testing

• ✅ just fmt
• ⚠️ cargo test -p codex-otel stderr_span_telemetry (environment limitation: crates.io download blocked with CONNECT tunnel failed, response 403)
• ⚠️ cargo test -p codex-otel stderr_span_telemetry --offline (environment limitation: required crate rustls-webpki not available locally)
• ✅ git diff --check

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