fix: daily summary scheduler, persona pull mtime, and stdio shutdown

[evanclan]

Summary

• Daily summary scheduler: scheduled_summary_day() targets the previous UTC day when the 5pm PDT job fires (fixes empty summaries after UTC midnight). summary_already_sent() skips duplicate sends when the archive sidecar already exists.
• Persona pull: PersonaBackend.pull_all() compares local file mtime against cloud key_mtime() and skips overwrite when local is newer (skipped_local_newer counter on PersonaReport).
• MCP shutdown: tracked background poll/scheduler tasks are cancelled in _shutdown_background_tasks() when the stdio session disconnects, so orphaned processes exit cleanly.

Closes three P1 items tracked in TODOS.md.

Test plan

• pytest tests/tools/test_daily_summary.py tests/storage/test_persona.py tests/test_background_shutdown.py -v (37 passed)
• ruff check on touched files

Made with Cursor

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In error

[brandwe]

Thanks for this. The persona mtime and background-task shutdown pieces look directionally good, and the targeted tests are passing locally.

One blocker on the daily summary duplicate gate: summary_already_sent(day) checks for summaries/{day}.json, but _run_daily_summary_internal() writes that sidecar during archive_summary(...) before the email send succeeds. That means a transient Graph send failure, or an operator running run_daily_summary(send=false) as a preview, can create the sidecar and cause the scheduler to skip the actual daily summary email forever.

Suggested fix: use a dedicated sent marker that is written only after send_summary_email completes successfully, e.g. summaries/{day}.sent.json, or check the interaction log for a daily_summary_sent event for that day. Keep the existing HTML/count archive as the render/archive artifact, but do not treat it as proof that mail was delivered.

Regression tests I’d expect:

• run_daily_summary(send=false) archives/sidecars but does not make the scheduler consider the day sent.
• if send_summary_email raises after archive, no sent marker is written and the next scheduler pass retries.
• after successful send, the sent marker/log gate suppresses duplicate scheduler sends.