List level before action in Stdout and Pretty exporters

[loks0n]

Summary

• Reorder Stdout NDJSON output so level appears first, then action, then the remaining attributes
• Reorder Pretty exporter attribute block so level is rendered first (action stays in the header)

Test plan

• vendor/bin/phpunit tests/Exporter/ passes (26 tests)
• Sample output confirmed: {"level":"info","action":"unknown",...}

🤖 Generated with Claude Code

[greptile-apps]

Greptile Summary

This PR reorders key fields in two span exporters so that level appears before action in output, making log lines easier to scan at a glance.

• Stdout.php: Builds an explicit $ordered array (level → action) before merging the remaining attributes, producing NDJSON of the form {\"level\":\"info\",\"action\":\"unknown\",...}.
• Pretty.php: Uses the standard PHP unset-and-prepend idiom to hoist level to the front of the attribute display block; action already lives in the header and is unaffected.

Confidence Score: 5/5

Both changes are narrow and additive — they only reorder output keys and do not touch business logic, error handling, or sampling.

The two exporters each gain a small, self-contained block that hoists level to the front of the output. The existing action-first logic is preserved, level is correctly removed from the remaining attributes before the merge, and there are no silent drops or duplicates. No control flow, error paths, or public APIs are changed.

No files require special attention.

Important Files Changed

Filename	Overview
src/Span/Exporter/Stdout.php	Reorders NDJSON output: level (when present) is placed before action, then remaining attributes follow. Logic is correct — level is unset from attributes before merging so it appears exactly once.
src/Span/Exporter/Pretty.php	Reorders the attribute display block so level renders first; action remains in the header. Standard PHP array-prepend idiom used correctly.

_{Reviews (1): Last reviewed commit: "List level before action in Stdout and P..." | Re-trigger Greptile}