can not initializing the RouteLLM controller

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when i initializing the RouteLLM controller with demo, i meet the errors below:

```
import os
from routellm.controller import Controller

os.environ["OPENAI_API_KEY"] = "sk-xxxxxxx"
os.environ["ANYSCALE_API_KEY"] = "esecret_xxxxx"

client = Controller(
routers=["mf"],
strong_model="gpt-4-1106-preview",
weak_model="anyscale/mistralai/Mixtral-8x7B-Instruct-v0.1",
)

response = client.chat.completions.create(
model="router-mf-0.11593",
messages=[
{"role": "user", "content": "Hello!"}
]
)
```

```
Traceback (most recent call last):
File "/usr/lib/python3.9/runpy.py", line 197, in _run_module_as_main
return _run_code(code, main_globals, None,
File "/usr/lib/python3.9/runpy.py", line 87, in _run_code
exec(code, run_globals)
File "/data/RouteLLM/.routellm/lib/python3.9/site-packages/routellm/openai_server.py", line 22, in
from routellm.controller import Controller, RoutingError
File "/data/RouteLLM/.routellm/lib/python3.9/site-packages/routellm/controller.py", line 10, in
from routellm.routers.routers import ROUTER_CLS
File "/data/RouteLLM/.routellm/lib/python3.9/site-packages/routellm/routers/routers.py", line 17, in
from routellm.routers.matrix_factorization.model import MODEL_IDS, MFModel
File "/data/RouteLLM/.routellm/lib/python3.9/site-packages/routellm/routers/matrix_factorization/model.py", line 4, in
from routellm.routers.similarity_weighted.utils import OPENAI_CLIENT
File "/data/RouteLLM/.routellm/lib/python3.9/site-packages/routellm/routers/similarity_weighted/utils.py", line 8, in
from sklearn.linear_model import LogisticRegression
File "/data/RouteLLM/.routellm/lib/python3.9/site-packages/sklearn/__init__.py", line 84, in
from .base import clone
File "/data/RouteLLM/.routellm/lib/python3.9/site-packages/sklearn/base.py", line 19, in
from .utils._estimator_html_repr import _HTMLDocumentationLinkMixin, estimator_html_repr
File "/data/RouteLLM/.routellm/lib/python3.9/site-packages/sklearn/utils/__init__.py", line 11, in
from ._chunking import gen_batches, gen_even_slices
File "/data/RouteLLM/.routellm/lib/python3.9/site-packages/sklearn/utils/_chunking.py", line 8, in
from ._param_validation import Interval, validate_params
File "/data/RouteLLM/.routellm/lib/python3.9/site-packages/sklearn/utils/_param_validation.py", line 14, in
from .validation import _is_arraylike_not_scalar
File "/data/RouteLLM/.routellm/lib/python3.9/site-packages/sklearn/utils/validation.py", line 26, in
from ..utils._array_api import _asarray_with_order, _is_numpy_namespace, get_namespace
File "/data/RouteLLM/.routellm/lib/python3.9/site-packages/sklearn/utils/_array_api.py", line 11, in
from .fixes import parse_version
File "/data/RouteLLM/.routellm/lib/python3.9/site-packages/sklearn/utils/fixes.py", line 20, in
import scipy.stats
File "/data/RouteLLM/.routellm/lib/python3.9/site-packages/scipy/stats/__init__.py", line 606, in
from ._stats_py import *
File "/data/RouteLLM/.routellm/lib/python3.9/site-packages/scipy/stats/_stats_py.py", line 49, in
from . import distributions
File "/data/RouteLLM/.routellm/lib/python3.9/site-packages/scipy/stats/distributions.py", line 11, in
from . import _discrete_distns
File "/data/RouteLLM/.routellm/lib/python3.9/site-packages/scipy/stats/_discrete_distns.py", line 10, in
from scipy.interpolate import interp1d
File "/data/RouteLLM/.routellm/lib/python3.9/site-packages/scipy/interpolate/__init__.py", line 167, in
from ._interpolate import *
File "/data/RouteLLM/.routellm/lib/python3.9/site-packages/scipy/interpolate/_interpolate.py", line 14, in
from . import _fitpack_py
File "/data/RouteLLM/.routellm/lib/python3.9/site-packages/scipy/interpolate/_fitpack_py.py", line 8, in
from ._fitpack_impl import bisplrep, bisplev, dblint # noqa: F401
File "/data/RouteLLM/.routellm/lib/python3.9/site-packages/scipy/interpolate/_fitpack_impl.py", line 103, in
'iwrk': array([], dfitpack_int), 'u': array([], float),
TypeError
```

i use python 3.9.5 and install routellm with

```
python3 -m venv .routellm
source .routellm/bin/activate

pip install "routellm[serve,eval]"
```

pls help to find the problem, ths!

Reproduce the Python 3.9.5 installation and follow the import chain from routellm/controller.py through routellm/routers/routers.py, routellm/routers/matrix_factorization/model.py, and routellm/routers/similarity_weighted/utils.py. Done means the documented routellm[serve,eval] setup can import Controller without the reported scipy TypeError.

Written by the indexing model from the issue text.