fix(log): guard non-Level "level" attribute against panic

[garmr-ulfr]

Summary

Hardens the radiance slog handler so a log call passing a non-slog.Level value keyed "level" can no longer panic the process.

Changes

• fix(log): guard non-Level "level" attribute against panic — In log/log.go, the ReplaceAttr slog.LevelKey case asserted a.Value.Any().(slog.Level) without a comma-ok check. Replaced with a checked assertion; on a type mismatch the handler now emits a group (level=WARN, an error attr describing the unexpected type, and the original value preserved under a typed level-<T> key) instead of crashing.

Bug Fixes

• Any log call passing an attribute keyed "level" with a non-slog.Level value crashed the whole process (previously hit by memmon's memory-tick log passing "level" as a string, worked around in 302a3ca by renaming the key). The handler is now panic-safe for that key regardless of the caller's value type.

Summary by CodeRabbit

• Bug Fixes
  • Prevented application crashes when log entries contain an unexpected level value.
  • Added clearer diagnostic information for invalid log-level attributes while preserving the original value.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 3453514b-8e28-4e52-8798-2effedb456cc

📥 Commits

Reviewing files that changed from the base of the PR and between 2de1c18 and 0b7e9c4.

📒 Files selected for processing (1)

• log/log.go

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📝 Walkthrough

Walkthrough

The slog attribute replacement logic now safely handles unexpected level value types, preserving valid level formatting and returning diagnostic attributes instead of panicking.

Changes

Log level formatting fix

Layer / File(s)	Summary
Guard level type assertion in ReplaceAttr log/log.go	ReplaceAttr formats values of type slog.Level with FormatLogLevel; unexpected types produce grouped attributes containing the original value type and an error string.

Estimated code review effort: 2 (Simple) | ~10 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly matches the main change: guarding the log level attribute against panics from non-slog.Level values.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch assert-slog-level-attr

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[Copilot]

Pull request overview

Hardens the log package’s slog handler by making ReplaceAttr resilient to callers that log a "level" attribute whose value is not a slog.Level, preventing a process panic and preserving additional context in the emitted log entry.

Changes:

• Adds a comma-ok type assertion for "level" attributes before calling FormatLogLevel.
• On type mismatch, emits a grouped set of attributes describing the mismatch instead of panicking.

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