- Fix jinja2.sandbox import: use `from jinja2.sandbox import
SandboxedEnvironment` (dotted attribute access doesn't work)
in templates.py, sync.py, and notifier.py
- Fix greenlet crash in tracker trigger: SQLAlchemy async sessions
can't survive across aiohttp.ClientSession context managers.
Eagerly load all tracker/server data before entering HTTP context.
Split check_tracker into check_tracker (scheduler, own session)
and check_tracker_with_session (API, reuses route session).
- Fix _check_album to accept pre-loaded params instead of tracker
object (avoids lazy-load access after greenlet context break)
Tested end-to-end against live Immich server:
- Server connection + album browsing: OK (39 albums)
- Template creation + preview: OK
- Webhook target creation: OK
- Tracker creation + trigger: OK (initialized 4 assets)
- Second trigger: OK (no_changes detected)
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
