[17.0][l10n_br_base] don't mess with base.main_company country_id; avoid demo conflicts

[rvalyi]

1. desativa o set BRL no main_company de demo no l10n_br_base, pois isso cria problemas. Por exemplo se instalar o l10n_br_base com demo e depois o modulo stock pega erros como:

2026-01-11 14:21:14,975 15474 INFO odoo17 odoo.modules.loading: Module stock: loading demo
2026-01-11 14:21:14,976 15474 INFO odoo17 odoo.modules.loading: loading stock/data/stock_demo_pre.xml
2026-01-11 14:21:15,189 15474 INFO odoo17 odoo.modules.loading: loading stock/data/stock_demo.xml
2026-01-11 14:21:16,176 15474 INFO odoo17 odoo.modules.loading: loading stock/data/stock_demo2.xml
2026-01-11 14:21:16,814 15474 WARNING odoo17 odoo.modules.loading: Module stock demo data failed to install, installed without demo data
Traceback (most recent call last):
  File "/home/rvalyi/DEV/odoo17/odoo/src/odoo/models.py", line 5896, in ensure_one
    _id, = self._ids
    ^^^^
ValueError: too many values to unpack (expected 1)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/rvalyi/DEV/odoo17/odoo/src/odoo/tools/convert.py", line 564, in _tag_root
    f(rec)
  File "/home/rvalyi/DEV/odoo17/odoo/src/odoo/tools/convert.py", line 280, in _tag_function
    _eval_xml(self, rec, env)
  File "/home/rvalyi/DEV/odoo17/odoo/src/odoo/tools/convert.py", line 205, in _eval_xml
    return odoo.api.call_kw(model, method_name, args, kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/rvalyi/DEV/odoo17/odoo/src/odoo/api.py", line 484, in call_kw
    result = _call_kw_multi(method, model, args, kwargs)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/rvalyi/DEV/odoo17/odoo/src/odoo/api.py", line 469, in _call_kw_multi
    result = method(recs, *args, **kwargs)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/rvalyi/DEV/odoo17/odoo/src/addons/stock/models/stock_picking.py", line 928, in action_confirm
    self.move_ids.filtered(lambda move: move.state == 'draft')._action_confirm()
  File "/home/rvalyi/DEV/odoo17/odoo/src/addons/stock/models/stock_move.py", line 1425, in _action_confirm
    moves = self._merge_moves(merge_into=merge_into)
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/rvalyi/DEV/odoo17/odoo/src/addons/stock/models/stock_move.py", line 1078, in _merge_moves
    neg_key = self._merge_move_itemgetter(distinct_fields, excluded_fields)
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/rvalyi/DEV/odoo17/odoo/src/addons/stock/models/stock_move.py", line 1040, in _merge_move_itemgetter
    currency_precision = self.company_id.currency_id.decimal_places
                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/rvalyi/DEV/odoo17/odoo/src/odoo/fields.py", line 1148, in __get__
    record.ensure_one()
  File "/home/rvalyi/DEV/odoo17/odoo/src/odoo/models.py", line 5899, in ensure_one
    raise ValueError("Expected singleton: %s" % self)
ValueError: Expected singleton: res.currency(5, 1)

Mas não é so isso, tambem tive que fazer isso pro port do l10n_br_account para a 17.0 aqui #4339 para evitar erros semelhantes com o modulo account. No PR #4339 eu mudo o main_company para BRL no hook de instalação do modulo account, ou seja mais tarde...

2. Tirando o base.main_company to Brasil nos dados de demo o teste seguinte passou a falhar:

Eu tive que fazer um commit nele para não depender do base.main_company

2. Eu tb arrumei o write do res.company para permitir de alterar para BRL ou USD as 3 empresas de demo. Pois na migração do l10n_br_account em [17.0][MIG] l10n_br_account #4339, eu deixo as empresas em USD para poder instalar o generic_coa (se não tiver os modulos l10n_br_simples o l10n_br_generic presentes, por exemplo porque não foram migrados ou instalados (caso l10n_br_account for com instalado com pip) e depois mudo as 3 empresas para BRL no hook do l10n_br_account.

[OCA-git-bot]

Hi @renatonlima,
some modules you are maintaining are being modified, check this out!

[CristianoMafraJunior]

isso aqui não deveria ser removido?

[rvalyi]

feito

[rvalyi]

/ocabot merge patch

[OCA-git-bot]

This PR looks fantastic, let's merge it!
Prepared branch 17.0-ocabot-merge-pr-4348-by-rvalyi-bump-patch, awaiting test results.

[OCA-git-bot]

Congratulations, your PR was merged at 0482530. Thanks a lot for contributing to OCA. ❤️