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e5ad92474c
_ensure_admin_user now runs a three-step pipeline on every boot:
Step 1 (fatal): admin user exists / is created / password is reset
Step 2 (non-fatal): LangGraph store orphan threads → admin
Step 3 (non-fatal): SQL persistence tables → admin
- threads_meta
- runs
- run_events
- feedback
Each step is idempotent. The fatal/non-fatal split mirrors PR #1728's
original philosophy: admin creation failure blocks startup (the system
is unusable without an admin), whereas migration failures log a warning
and let the service proceed (a partial migration is recoverable; a
missing admin is not).
Key helpers
-----------
- _iter_store_items(store, namespace, *, page_size=500):
async generator that cursor-paginates across LangGraph store pages.
Fixes PR #1728's hardcoded limit=1000 bug that would silently lose
orphans beyond the first page.
- _migrate_orphaned_threads(store, admin_user_id):
Rewritten to use _iter_store_items. Returns the migrated count so the
caller can log it; raises only on unhandled exceptions.
- _migrate_orphan_sql_tables(admin_user_id):
Imports the 4 ORM models lazily, grabs the shared session factory,
runs one UPDATE per table in a single transaction, commits once.
No-op when no persistence backend is configured (in-memory dev).
Tests: test_ensure_admin.py (8 passed)