Hard cutover of the HTTP surface: collapse the three legacy spellings
(/searchspaces, /search-spaces, /search-space/{id}) onto canonical
/workspaces/{workspace_id}/..., rename the gateway field-setter sub-actions to
singular /workspace, rename search_spaces_routes.py -> workspaces_routes.py and the
search_spaces_router -> workspaces_router include, and flip search_space_id ->
workspace_id in bodies/params. No alias routers: the old URLs now 404 by design.
Full app constructs with zero legacy path spellings.
- Introduced a new ENUM value 'NOTE' for document types in the database.
- Implemented backend routes for creating, listing, and deleting notes.
- Added a new frontend page for creating notes with a BlockNote editor.
- Updated sidebar to include recent notes and an option to add new notes.
- Enhanced API service for notes with validation and request/response schemas.
- Updated translations to support new note-related terms.
