Bootstrap Python rewrite skeleton

requirements.in

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+alembic>=1.14,<2.0
+fastapi>=0.115,<0.116
+jinja2>=3.1,<4.0
+pydantic-settings>=2.6,<3.0
+python-multipart>=0.0.12,<1.0
+pyyaml>=6.0,<7.0
+sqlalchemy>=2.0,<3.0
+uvicorn[standard]>=0.32,<1.0