* ♻️ Refactor and simplify internal data from `solve_dependencies()` using dataclasses. PR [#12100](https://github.com/fastapi/fastapi/pull/12100) by [@tiangolo](https://github.com/tiangolo).
* ♻️ Refactor and simplify internal `analyze_param()` to structure data with dataclasses instead of tuple. PR [#12099](https://github.com/fastapi/fastapi/pull/12099) by [@tiangolo](https://github.com/tiangolo).
* ♻️ Refactor and simplify dependencies data structures with dataclasses. PR [#12098](https://github.com/fastapi/fastapi/pull/12098) by [@tiangolo](https://github.com/tiangolo).