### Commit 1:

We fetch and store bills if we're able to parse and store them correctly. but in case we make a mistake

1. The cron gets stuck trying to fetch the problematic bill.
2. Users have no clue that there is a bill on KSeF that they have to fetch manually.

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1. Save the bill on a savepoint, to make sure one problematic bill doesn't affect others
2. Create all bills as draft first so that users have a reference to fallback to in case the have to do manual fetching.

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task-6310321

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### Commit 2:

Issues:

1. For a db with company_1 and company_2, when company_1 sends an invoice to company_2 via KSeF (out_invoice with a ksef number),
company_2 in the same database can't fetch the corresponding bill because there is a move with the same KSeF number.
2. The date difference between `from` and `to` in the `dateRange` must not exceed 3 months as explained in the documentation
https://api.ksef.mf.gov.pl/docs/v2/index.html#tag/Pobieranie-faktur/paths/~1invoices~1query~1metadata/post

Fixes:

1. Change the unique constraint and the domain to allow same KSeF number per different companies.
2. Minimize the `to` parameter with `from` + 2 months.
3. Increase the TIMEOUT to 30 seconds as 10 seconds is too small.

task-6260645

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Forward-Port-Of: odoo/odoo#272518
Forward-Port-Of: odoo/odoo#270511