ref(seer): Propagate viewer_context to feedback Seer call sites

[azulus]

Pass SeerViewerContext to all Seer API wrapper call sites in the feedback module.

PR #109697 added an optional viewer_context parameter to all Seer API wrapper functions. This PR updates the call sites in the feedback module to construct and pass SeerViewerContext from available org/user data:

• Endpoints (organization_feedback_categories, organization_feedback_summary): Pass both organization_id and user_id
• Ingest (create_feedback): Pass organization_id only (no user in ingest context)
• Intermediate functions (spam_detection, label_generation, title_generation): Thread viewer_context parameter through to underlying API calls

No behavior change — viewer_context defaults to None which preserves the existing behavior of not sending the header.

Co-Authored-By: Claude noreply@anthropic.com

[github-actions]

Backend Test Failures

Failures on 3d7c81b in this run:

tests/sentry/feedback/usecases/ingest/test_create_feedback.py::test_create_feedback_issue_title_from_seer — log

tests/sentry/feedback/usecases/ingest/test_create_feedback.py:814: in test_create_feedback_issue_title_from_seer
    mock_get_feedback_title.assert_called_once_with(
/opt/hostedtoolcache/Python/3.13.1/x64/lib/python3.13/unittest/mock.py:989: in assert_called_once_with
    return self.assert_called_with(*args, **kwargs)
/opt/hostedtoolcache/Python/3.13.1/x64/lib/python3.13/unittest/mock.py:977: in assert_called_with
    raise AssertionError(_error_message()) from cause
E   AssertionError: expected call not found.
E   Expected: get_feedback_title('The login button is broken and the UI is slow', 4557725013442560, True)
E     Actual: get_feedback_title('The login button is broken and the UI is slow', 4557725013442560, True, viewer_context={'organization_id': 4557725013442560})

tests/sentry/feedback/usecases/ingest/test_create_feedback.py::test_create_feedback_issue_title — log

tests/sentry/feedback/usecases/ingest/test_create_feedback.py:781: in test_create_feedback_issue_title
    mock_get_feedback_title.assert_called_once_with(
/opt/hostedtoolcache/Python/3.13.1/x64/lib/python3.13/unittest/mock.py:989: in assert_called_once_with
    return self.assert_called_with(*args, **kwargs)
/opt/hostedtoolcache/Python/3.13.1/x64/lib/python3.13/unittest/mock.py:977: in assert_called_with
    raise AssertionError(_error_message()) from cause
E   AssertionError: expected call not found.
E   Expected: get_feedback_title('This is a very long feedback message that describes multiple issues with the application including performance problems, UI bugs, and various other concerns that users are experiencing', 4557725042933760, False)
E     Actual: get_feedback_title('This is a very long feedback message that describes multiple issues with the application including performance problems, UI bugs, and various other concerns that users are experiencing', 4557725042933760, False, viewer_context={'organization_id': 4557725042933760})