### Issue:
When multiple partners share the same email address, `_mail_find_partner_from_emails` may resolve to the wrong partner when the input is a formatted email like "`Name <email>`"

This affects use cases like email templates using `{{object.company_id.email_formatted}}` as sender, where the wrong company partner could be selected

### Cause:
The lookup in `done_partners` only matched on `email_normalized`, which cannot distinguish partners sharing the same email but with different names

The `email_formatted` field carries both name and email, allowing an exact match when the input is a formatted email

### Steps to reproduce:
- Install `account`
- Create an Email Template (Applies to: account.move, From: {{object.company_id.email_formatted}})
- Create a second company B with the same email as the default (e.g. info@yourcompany.com)
- In Settings (logged in as company B), set a Fiscal Position (e.g. US Taxable)
- Create an Invoice on company B
- In the chatter, click Send message, click the expand arrows button, use the three dots menu to select the template
- Send and check the Sender in the chatter

Before the fix, the sender resolves to the default company even though the invoice belongs to company B

opw-6260992

Forward-Port-Of: odoo/odoo#282966
Forward-Port-Of: odoo/odoo#269509

Issue:

- DATEV does not support multiple foreign currencies on a single journal line.
- This can occur when reconciling a bank transaction where:
  - the payer uses one currency (C1),
  - the bank journal is held in another currency (C2),
  - the company uses a third currency (C3).
- The existing export logic could not represent the bank liquidity and
  foreign AR/AP currencies separately in such cases.

Fix:

- Detect 3-currency cases from bank statement transactions and their
  liquidity line.
- Use the DATEV clearing account (1360 SKR03 / 1460 SKR04) to split the
  transaction into two logical legs:
  - Bank → Clearing (bank journal currency)
  - AR/AP → Clearing (payer currency)
- Emit the liquidity leg only once when multiple foreign AR/AP lines are
  reconciled against the same bank transaction.
- Keep regular 1- and 2-currency transactions on the existing export path.

Impact:

- Correctly represents 3-currency bank settlements in DATEV.
- Keeps each exported line in a single foreign currency.
- Leaves manual entries and payment transactions outside this specific
  handling, as the scenario is specific to the bank liquidity line.

taskID-5457547

Forward-Port-Of: odoo/enterprise#128576
Forward-Port-Of: odoo/enterprise#109010

**Steps to reproduce:**
- Install Accounting, Sales and l10n_pe_edi
- Switch to a Peruvian company (e.g. PE Company)

- Create a SO:
  * Customer: [a Peruvian customer]
  * Order Lines:
    | Product | Quantity | Unit Price |  Taxes  | 
    | ------- | -------- | ---------- | ------- |
    |   any   |   3.00   |   123.50   | VAT 18% |
    |   any   |   2.00   |  27.544216 |  0% Ina |
    |   any   |   1.00   |  43.490867 |  0% Exo |

- Confirm the SO
- Create a 40% down payment
- Confirm the down payment
- Process it to sent it to Peru UBL 2.1

**Issue:**
The following error message is returned by the OSE:
`3272|La base imponible a nivel de línea difiere de lainformación consignada en el comprobante - Detalle: xxx.xxx.xxx ticket : 20260000000000221633458 error: Error en la Linea Nro. :1. : 3272 (nodo: "cac:TaxSubtotal/cbc:TaxableAmount" valor: "148.20")`

**Cause:**
In the XML, one line has 148.19 for "cbc:LineExtensionAmount", but 148.20 for "cac:TaxSubtotal/cbc:TaxableAmount".
The issue is coming from the fact that "base_amount_currency" is used instead of "total_excluded_currency" for the computation of "cac:TaxSubtotal/cbc:TaxableAmount".

**Issue 2:**
When a tax is impacting the base amount of a following tax, its tax amount is not taken into account in "total_excluded_currency".

opw-6235909

Forward-Port-Of: odoo/enterprise#128602
Forward-Port-Of: odoo/enterprise#122310