fix(tech-catalog): read both survey-report payload shapes for an annotation

[dwolfson]

Follow-up to #604 (annotation reuse / fromSurveyReports).

Problem

_survey_reports() reads only the list fromSurveyReports. That is only the payload pyegeria passes through; a platform that has not moved to it still returns the single fromSurveyReport, and against that every annotation looks report-less. The running quickstart platform is one of those (its annotation beans carry a singular fromSurveyReport dict at graph depth 1 and no plural).

Measured on the live quickstart with the plural-only helper from main: 0 of 16 survey reports return any annotations from GET /api/tech-catalog/survey-reports/{guid}/annotations, so the report drill-down and report filter are empty and the Annotations table loses its report column and "go to report" button.

Change (quickstart and freshstart)

_survey_reports() reads fromSurveyReports and, when that is absent or empty, wraps the single fromSurveyReport as a one-item list, so one code path serves both payloads. The list wins when both are present and nothing is duplicated; a wrongly typed list field is ignored and a lone dict in it is tolerated. No change to callers (_serialize_annotation, the report-annotations endpoint) or to tech-catalog.html.

Measured on the live platform with the fix: 8 of the 16 survey reports return annotations (460 in total, bounded by the page size).

Tests

• tests/test_survey_reports_payload.py: 14 cases run against the helper extracted (via ast) from each handler file, i.e. 28 tests, without importing pyegeria or FastAPI. List newest-first; singular fallback; list wins when both present; empty list falls back; no link; malformed entries; wrongly typed field; lone dict; missing createTime sorts last.
• Against the previous (plural-only) handlers the singular-payload, empty-list and wrongly-typed cases fail, so the tests detect the problem.
• Live check described above.
• Not exercised against a platform that returns the plural form (none available here); the plural path is covered by the unit tests only.

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