fix: add function name fallback for Jest timing marker matching

[Saga4]

Summary

• Adds function name fallback when matching timing markers
• Fixes marker matching when test names are "unknown" in Vitest

Problem

When Vitest doesn't provide test context (or when tests are configured in certain ways), timing markers may have "unknown" as the test name. The marker matching logic was only matching by test name (group 2), causing all markers to fail matching.

Example failing marker:

!$######unknown:unknown:testFunction:1:42_0######$!

Solution

Added fallback to also match by function name (group 3 in the marker), which is always set correctly:

# Before (only test name matching):
matching_starts = [m for m in start_matches if sanitized_test_name in m.group(2)]

# After (test name OR function name matching):
matching_starts = [
    m for m in start_matches
    if sanitized_test_name in m.group(2) or sanitized_func_name == m.group(3)
]

Test plan

• Added test file tests/test_verification/test_jest_marker_matching.py
• Tests verify fallback matching works correctly
• Tests verify normal matching still works
• Manual testing with Vitest-based projects

Generated with Claude Code

[Saga4]

Closing - needs more verification before merging