The CEO dashboard requested /api/tickets?page_size=500, but the API caps
page_size at 200 (le=200 in app/routers/tickets.py), so the request
returned 422 and every KPI/chart rendered zeros.
- ceo.html: fetch all tickets by looping pages of page_size=200 until
total items are collected (with a safety bound), keeping KPIs accurate
as volume grows past 200.
- tests: add test suite anchoring the pagination contract — page_size=500
returns 422, page_size=200 returns items/total/page/page_size, and a
page loop collects every ticket without duplicates.
- pyproject: enable pytest-asyncio auto mode and tests/ discovery.
- .gitignore: un-ignore committed tests/test_*.py.
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