Merge pull request #39 from chirpz-ai/subscription

fixing: Hobby reset deletes Redis data before DB commit

making pattern consistant

fixing a bug: adding increment rollback in case session commit fails

removing the ephemeral session access due to false premise

ruff formagt

removing dead code

fixing a bug: Stale canceled_at persists after cancellation reversal

ruff format

fixing Webhook double-commits via get_db_session auto-commit pattern

adding warm up cache + emergency access to a short lived session access in case cache in lost

removing direct access to db session

moving enum variables to be clean

fixing a critical bug: Webhook handler doesn't update plan on subscription changes

closing redis redis client after webhook process