Typing lost on `filtered` / `grouped` / `filtered_domain`

[andg-odoo]

Post OXP feature/bug request (Not 1.0 blocking):

Your setup
Version: main branch via cargo install --git
Operating System: Ubuntu 24.04
IDE and/or Integration tool (for example: Vscode - official extension): neovim lsp

Describe the bug

• If a recordset is filtered (or filtered_domain), it will return always return a recordset of the model that was filtered even if empty, as such, the default typing of TypeVar | Any is incorrect as it should always be the same model as the original. This occurs for self.filtered(), self.field.filtered(), recordset.filtered(), and all filtered_domain calls as well

• If possible this should also apply to grouped which will return the model as the value of the returned dictionary. A nice to have would be key typing based on if the string it is grouped by refers to a field in the model that way the dictionary would be typed as {field: model} but that sounds difficult.

To Reproduce
Steps to reproduce the behavior: grouped or filtered a recordset.

Expected behavior
Typing occurs on filtered / filtered_domain / grouped

Screenshots
Filtered typing:

Grouped typing: