mweinbach2/23/2026, 4:01:56 PM

Load legacy config files through readLayer() instead of
separate fileExists() checks, giving them proper precedence
in the merge pipeline rather than ignoring their servers.

- Add user_legacy and workspace_legacy to precedence order
- Remove standalone fileExists() helper
- Simplify file state construction via fileForSource()
- Update tests to verify legacy servers are included

Parent0b64f43