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Fix timer action 500s after FastAPI upgrade

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FastAPI 0.141 raises when response serialization hits a lazy-load
(current_block.subject.options) in async context, where 0.115 silently
skipped it. Eager-load Subject.options in session get/timer and the TV
dashboard queries. Pin pydantic 2.13.5.

Co-Authored-By: Claude Opus 5.5 <[email protected]>
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derekcandClaude Opus 5.5 committed 2026-09-24 23:51:10 -07:00
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reports/maintenance-2026-09-24.md
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@@ -156,6 +156,10 @@ This section was first blocked on backups. The user then asked for the HIGH find
| homeschool_backend | homeschool-backend | sha256:51b49afb4ec4… |
| homeschool_frontend | homeschool-frontend | sha256:f9a737699cda… |
### Post-deploy regression
After the HIGH deploy, `POST /api/sessions/{id}/timer` returned **500 on every call**: 8 failures, 0 successes, starting 06:43 UTC. FastAPI 0.141 raises on a failed lazy-load of `current_block.subject.options` during response serialization, where 0.115 silently skipped it. The first smoke test didn't cover timer actions. Fixed in v1.1.0 by eager-loading `Subject.options` in `sessions.py` and `dashboard.py`. The smoke test now covers the full timer lifecycle, the TV dashboard with an active block, schedule/subject writes, and every parameterless GET route (from the OpenAPI spec).
### Post-update scan (trivy HIGH/CRITICAL)
| Image | Before | After |