feat: add WonderQ admin backend

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

alembic/env.py

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+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()

alembic/versions/.gitkeep

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+

alembic/versions/0001_initial_schema.py

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+"""Initial SQLAlchemy schema.
+
+Revision ID: 0001_initial_schema
+Revises:
+Create Date: 2026-06-30
+"""
+
+from alembic import context, op
+from sqlalchemy import inspect
+from app.database import Base
+from app import models  # noqa: F401
+
+
+revision = "0001_initial_schema"
+down_revision = None
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    bind = op.get_bind()
+    if context.is_offline_mode():
+        Base.metadata.create_all(bind=bind, checkfirst=False)
+        return
+    existing_tables = set(inspect(bind).get_table_names())
+    for table in Base.metadata.sorted_tables:
+        if table.name not in existing_tables:
+            table.create(bind)
+
+
+def downgrade() -> None:
+    Base.metadata.drop_all(bind=op.get_bind(), checkfirst=not context.is_offline_mode())