feat: add WonderQ admin backend

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

tests/test_auth.py

@@ -0,0 +1,7 @@
+from app.auth import hash_password, verify_password
+
+
+def test_bcrypt_hash_verifies_password():
+    password_hash = hash_password("ChangeMe123!", rounds=4)
+    assert verify_password("ChangeMe123!", password_hash)
+    assert not verify_password("bad-password", password_hash)