Created scripts/create_template_db.py that builds a pre-migrated SQLite
template database using Base.metadata.create_all() + alembic stamp
(~5ms for 34 tables, vs ~0.5-3s x 25 Alembic migrations per scenario).
Nox unit_tests and coverage_report sessions generate the template before
test execution and propagate CLEVERAGENTS_TEMPLATE_DB env var to all
workers.
features/environment.py before_all() installs a monkey-patch on
MigrationRunner.init_or_upgrade that copies the template for fresh
scenario temp DBs, falling through to real migrations for :memory:,
existing files, and migration-runner unit tests.
Quick wins: sleep(0.5) -> sleep(0.05) in cli_streaming wait step;
removed redundant Background re-declaration in cli_streaming.feature
scenario 7.
ISSUES CLOSED: #483
freemo
brent.edwards
