[19.0][MIG] report_positioned_image: Migration to 19.0 - #1193

…ity (#35)

Vendors two OCA modules from `OCA/reporting-engine`:

| Module | Source | Commit |
|---|---|---|
| `report_positioned_image` | [#1193](OCA/reporting-engine#1193) (open, not yet on `19.0`) | `30d0138` |
| `report_qweb_element_page_visibility` | `19.0` branch | `b730d60` |

The second is a dependency of the first and is not otherwise reachable from this project's addons path, since ocj aggregates no upstream OCA repositories. It is already on the upstream `19.0` branch, so that copy is redundant with upstream and can be retired if `reporting-engine` is ever aggregated directly.

Each module's origin is recorded below as a `Vendored from <repo>@<sha> (<ref>)` line, so a later re-sync can tell which upstream commit the copy is — which matters most for `report_positioned_image`, whose source is a PR head that can move or be closed.

[QT7096](https://www.quartile.co/web#id=7096&cids=3&menu_id=506&action=1457&model=project.task&view_type=form)

Vendored from OCA/reporting-engine@30d0138 (refs/pull/1193/head)
Vendored from OCA/reporting-engine@b730d60 (19.0)

Assisted-by: Claude Opus 5