This issue tracks adding Google-style docstrings to public APIs in dspy/evaluate/metrics.py.

Scope:

• Add/complete function docstrings for public metrics (e.g., answer_exact_match, answer_passage_match).
• Follow the Google Python Style Guide.
• Include a short usage example where helpful.
• Ensure correctness (no speculative behavior).

Context: refs #8926 (docstrings help-wanted)
I’m claiming this file and will open a PR that resolves this issue.

Reviewer: @chenmoneygithub