Rename GET/PUT /api/config/actions/{name} to /actions/{name}/raw in
file_config.py to eliminate the route-shadowing conflict with config.py,
which registers its own GET /actions/{name} returning ActionConfig.
Add configActionRaw endpoint helper in endpoints.ts and update
fetchActionFile/updateActionFile in config.ts to use it. Add
TestGetActionFileRaw and TestUpdateActionFileRaw test classes.