"""Alembic environment for migrations."""
from logging.config import fileConfig
from sqlalchemy import engine_from_config, pool
from alembic import context

config = context.config
if config.config_file_name is not None:
    fileConfig(config.config_file_name)

import os, sys
sys.path.insert(0, os.getcwd())

from app.models import Base  # noqa
target_metadata = Base.metadata

db_url = os.environ.get("DATABASE_URL") or config.get_main_option("sqlalchemy.url")
config.set_main_option("sqlalchemy.url", db_url)


def run_migrations_offline() -> None:
    context.configure(url=db_url, literal_binds=True, dialect_opts={"paramstyle": "named"})
    with context.begin_transaction():
        context.run_migrations()


def run_migrations_online() -> None:
    connectable = engine_from_config(config.get_section(config.config_ini_section, {}),
                                     prefix="sqlalchemy.", poolclass=pool.NullPool)
    with connectable.connect() as connection:
        context.configure(connection=connection, target_metadata=target_metadata)
        with context.begin_transaction():
            context.run_migrations()


if context.is_offline_mode():
    run_migrations_offline()
else:
    run_migrations_online()
---requirements full---
# Core framework
fastapi==0.115.6
uvicorn[standard]==0.34.0
gunicorn==23.0.0
python-multipart==0.0.20

# Database
SQLAlchemy==2.0.36
psycopg[binary]==3.2.3
alembic==1.14.0

# Redis / Celery
redis==5.2.1
celery==5.4.0

# Security
pyjwt==2.10.1
bcrypt==4.0.1  # direct bcrypt usage (passlib 1.7.4 incompatible with bcrypt>=4.1)
cryptography==44.0.0
itsdangerous==2.2.0
email-validator==2.2.0

# Google APIs
google-auth==2.37.0
google-auth-oauthlib==1.2.1
google-auth-httplib2==0.2.0
google-api-python-client==2.157.0

# PDF generation
weasyprint==62.3
pydyf==0.11.0  # weasyprint 62.3 incompatible with pydyf 0.12+ ('transform' removed)

# Templates / email
jinja2==3.1.5
beautifulsoup4==4.12.3
lxml==5.3.0
bleach==6.2.0

# HTTP / testing
httpx==0.28.1
pytest==8.3.4
pytest-asyncio==0.25.0

# Utility
python-dateutil==2.9.0.post0
slowapi==0.1.9