Background automations had no session, so get_current_profile_id() fell back to
admin (1) — wrong for a non-admin's scheduled job. Now the engine declares the
automation's owner around handler execution via a contextvar
(core/profile_context.py), and get_current_profile_id() consults it only when
there's NO web request. So:
- a real logged-in request always wins (foreground unchanged),
- admin + system automations are profile 1 → resolve to admin exactly as before
(the 8 admin-owned auto-sync pipelines behave identically),
- only non-admin-owned automations gain their correct identity, deep through the
whole call chain (incl. the per-profile client resolvers) — no threading
profile_id through dozens of signatures.
Reset in a finally so a pooled thread can't leak the override to the next job.
Tests: contextvar set/reset/nested; get_current_profile_id honours the override
only outside a request (a real session still wins); and end-to-end — the engine
runs a non-admin automation as profile 4, an admin one as 1, an explicit trigger
profile overrides the owner, and the context resets even when the handler raises.
27 + 4 tests pass.
Part 2 (next): point the sync handlers' source-playlist READ at
get_spotify_client_for_profile so a non-admin's auto-sync pulls THEIR playlist.
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