Default/system trees had no author_id (NULL), causing a NOT NULL violation
when syncing steps to step_library.created_by on publish.
- Add is_service_account flag to users table (migration 4f4137ce)
- Add service_account.py: idempotent ensure_service_account() creates
noreply@resolutionflow.com with unusable password on startup
- Cache service account ID on app.state at lifespan startup
- Add get_service_account_id() FastAPI dep (returns None in tests)
- sync_steps_from_tree: resolve author_id or service_account_id as created_by
- create_tree: set author_id=service_account_id for is_default trees
- Migration 1490781700bc: backfill author_id on 31 existing default trees
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
When a system/default tree has no author (author_id is None),
str(None) produces the literal string 'None' which asyncpg
rejects as an invalid UUID for the created_by column.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- Call sync_steps_from_tree in update_tree whenever the tree is published
(status transitions to 'published' or is already published and structure changes)
- Call deactivate_synced_steps_for_tree in delete_tree before db.commit()
so the FK SET NULL does not nullify source_tree_id before the WHERE clause runs
- Fix ::jsonb cast syntax in step_sync.py (asyncpg rejects :: operator in text()
queries; replaced with CAST(:content AS jsonb))
- Add UniqueConstraint('source_tree_id','source_node_id') to StepLibrary model
so Base.metadata.create_all (used by tests) creates the constraint that the
ON CONFLICT clause in sync_steps_from_tree depends on
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
