fix: resolve relative --project path to absolute in report command

[claude]

Summary

• filepath.Clean('.') returns '.' -- a relative path that never matches absolute paths stored in the activity log.
• Fix uses filepath.Abs() to resolve the --project flag value against the current working directory before comparison, so 'uncompact report --project .' now correctly matches entries for the current project.
• Also updated the filterEntries doc comment to reflect the new contract (absolute path instead of cleaned path).

Changes

• cmd/report.go lines 82-88: Replace filepath.Clean with filepath.Abs (fallback to filepath.Clean on error) for the project filter.

Fixes #430

Generated with Claude Code