fix: CI test failures on Windows

- TestVersionChangesCoverage: Add missing 3rd changelog entry for v0.25.1
- TestDefaultPath: Use filepath.Join for cross-platform path handling
- TestDebouncer_CancelWithNoPendingAction: Increase sleep from 60ms to 100ms
  to account for Windows timer imprecision

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

cmd/bd/info.go

@@ -293,6 +293,7 @@ var versionChanges = []VersionChange{
 		Changes: []string{
 			"Zombie Resurrection Prevention - Stale clones can no longer resurrect deleted issues",
 			"bd sync commit scope fixed - Now commits entire .beads/ directory before pull",
+			"bd prime ephemeral branch detection - Auto-detects ephemeral branches and adjusts workflow",
 		},
 	},
 	{