Steps to reproduce:
--------------------------------
1. Install Subscription module
2. Create a new subscription quotation and confirm it
3. Generate an invoice for the subscription
4. Attempt to cancel the subscription
   * A ValidationError is correctly raised
5. Close the subscription by selecting any close (churn) reason
6. Attempt to cancel the same closed subscription again

Observation:
--------------------------------
The subscription is successfully cancelled even though it already has invoices

Issue:
--------------------------------
In the following code:
https://github.com/odoo/enterprise/blob/9e39b4b85fcb9f6ed5b21b942796b76b8a6eefdb/sale_subscription/models/sale_order.py#L741-L742 The cancellation logic does not check whether a subscription is already churned and still has active invoices

Solution:
--------------------------------
Added an additional condition to prevent cancelling churned subscriptions that still have active invoices

opw-5479719

Forward-Port-Of: odoo/enterprise#106596

# Steps to reproduce:
* Enable **Developer Mode**.
* Go to **Accounting → Configuration → Accounting → Accounting Reports**.
* Create a new report and enable **Composite Report**.
* Add a new line of type **Journal Report**.
* Save the report and create a menu item from the gear icon.
* Open the report from the reporting menu.
* Try to download the report in **PDF** format.

# Observed behavior:
* PDF export fails with a traceback.
* Composite reports containing journal report sections cannot be exported as PDF.

# Cause
When exporting a composite report to PDF, the export flow iterates over each embedded sub-report and generates the HTML body used for PDF rendering.

* The composite export relies on the base [`export_to_pdf`](https://github.com/odoo/enterprise/blob/a4e2c7c7d3aa50c8b57668c9ca73f523a31a5c41/account_reports/models/account_report.py#L5875) implementation from `account.report`, which directly calls `_get_pdf_export_html()` for each sub-report.

* For standard reports, this works as expected because they use the base [`_get_pdf_export_html`](https://github.com/odoo/enterprise/blob/a4e2c7c7d3aa50c8b57668c9ca73f523a31a5c41/account_reports/models/account_report.py#L5944) method, which renders flat report lines into the default PDF template.

* Journal reports, however, rely on a completely different PDF structure. Their templates expect `document_data` (journal entries grouped by journal/document) instead of flat report lines.

* This `document_data` is generated exclusively by the journal report’s custom handler via its own [`export_to_pdf`](https://github.com/odoo/enterprise/blob/a4e2c7c7d3aa50c8b57668c9ca73f523a31a5c41/account_reports/models/account_journal_report.py#L240) flow.

* The handler builds the required `document_data` using [`_generate_document_data_for_export`](https://github.com/odoo/enterprise/blob/a4e2c7c7d3aa50c8b57668c9ca73f523a31a5c41/account_reports/models/account_journal_report.py#L261C9-L261C22).

* When a journal report is embedded inside a composite report, the composite export logic bypasses the custom handler and forces the report through the base `_get_pdf_export_html()` pipeline.

* Since the base pipeline does not generate `document_data`, the journal report PDF template fails at render time with `KeyError: 'document_data'`.

In short, journal reports embedded in composite reports were incorrectly routed through the standard PDF export pipeline instead of their specialized handler-based one.



# Fix:
* Add PDF export support to the journal report custom handler.
* Centralize common print option logic in a shared helper.
* Update composite report export logic to delegate PDF generation to custom handlers when available.
* Journal reports inside composite reports now export to PDF correctly.

opw-5477551

Forward-Port-Of: odoo/enterprise#109262
Forward-Port-Of: odoo/enterprise#105040