[BUG] maturity and existing filters raise an AttributeError

## Describe the bug
In MUSE 1.3.2 and 1.3.3, I get the following error when using the maturity and existing filters:

-- 2025-02-17 18:43:50 - muse.filters - INFO

Computing filter: maturity


Traceback (most recent call last):

  File "", line 198, in _run_module_as_main

  File "", line 88, in _run_code

  File "...\.venv\Scripts\muse.exe\__main__.py", line 7, in 

    sys.exit(run())

             ~~~^^

  File "...\.venv\Lib\site-packages\muse\__main__.py", line 64, in run

    muse_main(args.settings, args.model, args.copy)

    ~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

  File "...\.venv\Lib\site-packages\muse\__main__.py", line 59, in muse_main

    MCA.factory(settings).run()

    ~~~~~~~~~~~~~~~~~~~~~~~~~^^

  File "...\.venv\Lib\site-packages\muse\mca.py", line 295, in run

    _, new_market, self.sectors = self.find_equilibrium(new_market)

                                  ~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^

  File "...\.venv\Lib\site-packages\muse\mca.py", line 198, in find_equilibrium

    return find_equilibrium(

        market=market,

    ...<6 lines>...

        equilibrium=self.equilibrium,

    )

  File "...\.venv\Lib\site-packages\muse\mca.py", line 444, in find_equilibrium

    market, equilibrium_sectors = single_year_iteration(market, sectors)

                                  ~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^

  File "...\.venv\Lib\site-packages\muse\mca.py", line 361, in single_year_iteration

    sector_market = sector.next(

        market[["supply", "consumption", "prices"]]  # type:ignore

    )

  File "...\.venv\Lib\site-packages\muse\sectors\sector.py", line 220, in next

    subsector.invest(

    ~~~~~~~~~~~~~~~~^

        technologies=self.technologies.sel(year=investment_year),

        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

        market=market,

        ^^^^^^^^^^^^^^

    )

    ^

  File "...\.venv\Lib\site-packages\muse\sectors\subsector.py", line 71, in invest

    self.aggregate_lp(technologies, market)

    ~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^

  File "...\.venv\Lib\site-packages\muse\sectors\subsector.py", line 103, in aggregate_lp

    agent.next(technologies=technologies, market=market, demand=share)

    ~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

  File "...\.venv\Lib\site-packages\muse\agents\agent.py", line 340, in next

    self.search_rules(self, demand, technologies, market).fillna(0).astype(int)

    ~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

  File "...\.venv\Lib\site-packages\muse\filters.py", line 230, in filters

    result = function(agent, result, *args, **kwargs)

  File "...\.venv\Lib\site-packages\muse\registration.py", line 176, in decorated

    result = inner_decorated(*args, **kwargs)

  File "...\.venv\Lib\site-packages\muse\filters.py", line 139, in decorated

    result = function(agent, search_space, *args, **kwargs)  # type: ignore

  File "...\.venv\Lib\site-packages\muse\filters.py", line 341, in maturity

    capacity = agent.filter_input(market.capacity, year=agent.year)

                                  ^^^^^^^^^^^^^^^

  File "...\.venv\Lib\site-packages\xarray\core\common.py", line 302, in __getattr__

    raise AttributeError(

        f"{type(self).__name__!r} object has no attribute {name!r}"

    )

AttributeError: 'Dataset' object has no attribute 'capacity'

## To Reproduce

Edit Agents.csv in the default or default_retro folders with a dedicated SearchRule.

## Note

These filters work in MUSE 1.3.1