feat: add WonderQ admin backend

Add FastAPI admin/public API service, database setup, Docker deployment files, docs, and tests.

alembic/env.py

@@ -0,0 +1,41 @@
+from logging.config import fileConfig
+from alembic import context
+from app.config import get_settings
+from app.database import Base
+from app import models  # noqa: F401
+
+
+config = context.config
+if config.config_file_name is not None:
+    fileConfig(config.config_file_name)
+
+target_metadata = Base.metadata
+
+
+def run_migrations_offline() -> None:
+    context.configure(
+        url=get_settings().sqlalchemy_url,
+        target_metadata=target_metadata,
+        literal_binds=True,
+        dialect_opts={"paramstyle": "named"},
+    )
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+def run_migrations_online() -> None:
+    from sqlalchemy import engine_from_config, pool
+
+    configuration = config.get_section(config.config_ini_section, {})
+    configuration["sqlalchemy.url"] = get_settings().sqlalchemy_url
+    connectable = engine_from_config(configuration, 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()