Quality: `ptr16` is not defined in micropython-samd-stubs

## Problem The type checker reports `"ptr16" is not defined` when using `ptr16` in code targeting the SAMD port. **Affected stub package:** `micropython-samd-stubs` **Stub version:** v1.28.0.post3 **Affected module/symbol:** `ptr16` (expected to be a valid type/symbol in the SAMD port stubs) ## Current behavior ``` foo.py:58:11 error "ptr16" is not defined ``` `ptr16` is not exported or defined in the samd stubs, causing type errors when used in user code. ## Expected behavior `ptr16` should be defined in the samd stubs (likely as a type alias or class) so that valid MicroPython code targeting SAMD does not produce false-positive type errors. ## Parent issue See #888 for the original report and full reproduction context. Related to #888 > [!NOTE] > <details> > <summary>🔒 Integrity filter blocked 3 items</summary> > > The following items were blocked because they don't meet the GitHub integrity level. > > - [#733](https://github.com/Josverl/micropython-stubs/issues/733) `search_issues`: has lower integrity than agent requires. The agent cannot read data with integrity below "approved". > - [#732](https://github.com/Josverl/micropython-stubs/issues/732) `search_issues`: has lower integrity than agent requires. The agent cannot read data with integrity below "approved". > - [#734](https://github.com/Josverl/micropython-stubs/issues/734) `search_issues`: has lower integrity than agent requires. The agent cannot read data with integrity below "approved". > > To allow these resources, lower `min-integrity` in your GitHub frontmatter: > > ```yaml > tools: > github: > min-integrity: approved # merged | approved | unapproved | none > ``` > > </details> > Generated by [quality-issue-triage](https://github.com/Josverl/micropython-stubs/actions/runs/25634753244/agentic_workflow) for issue #888 · ● 1.2M · [◷](https://github.com/search?q=repo%3AJosverl%2Fmicropython-stubs+is%3Aissue+%22gh-aw-workflow-call-id%3A+Josverl%2Fmicropython-stubs%2Fquality-issue-triage%22&type=issues) <!-- gh-aw-agentic-workflow: quality-issue-triage, engine: copilot, version: 1.0.40, model: claude-sonnet-4.6, id: 25634753244, workflow_id: quality-issue-triage, run: https://github.com/Josverl/micropython-stubs/actions/runs/25634753244 --> <!-- gh-aw-workflow-id: quality-issue-triage --> <!-- gh-aw-workflow-call-id: Josverl/micropython-stubs/quality-issue-triage -->