- script_template.py: add server_default to ALL NOT NULL columns so
Base.metadata.create_all matches Alembic behavior for raw SQL INSERTs
- test_session_branches_api.py: fork_reason needs 5+ chars ("test" → "testing fork")
- test_scripts.py: engineers CAN create templates (assert 201, not 403)
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- script_template.py: add server_default for requires_elevation,
is_gallery_featured, gallery_sort_order so Base.metadata.create_all
emits proper SQL DEFAULTs (test fixtures use raw SQL INSERT)
- session_branches.py: refresh fork_point after commit so JSONB options
field is loaded before Pydantic serialization
- test_session_branches_api.py: add status assertion on fork response
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
