remove unused mistral client and pin dependencies

mistralai 2.x moved the Mistral class out of the top-level package,
breaking the daily CI run. The client was instantiated but never used,
so drop it along with the unused rate_limited_mistral_chat helper, and
pin remaining deps to avoid future surprise upgrades.

src/pull_available_models.py

@@ -7,7 +7,6 @@ import requests
 import os
 from dotenv import load_dotenv
 from google.cloud import cloudquotas_v1
-from mistralai import Mistral
 from concurrent.futures import ThreadPoolExecutor
 import time
 import re
@@ -23,10 +22,6 @@ from data import (
 load_dotenv()
 script_dir = os.path.dirname(os.path.abspath(__file__))
 
-# Global clients
-mistral_client = Mistral(api_key=os.environ["MISTRAL_API_KEY"])
-last_mistral_request_time = 0
-
 
 def create_logger(provider_name):
     logger = logging.getLogger(provider_name)
@@ -485,20 +480,6 @@ def fetch_lambda_models(logger):
     return ret_models
 
 
-def rate_limited_mistral_chat(client, **kwargs):
-    global last_mistral_request_time
-
-    # Ensure at least 1 second between requests
-    current_time = time.time()
-    time_since_last = current_time - last_mistral_request_time
-    if time_since_last < 1:
-        time.sleep(1 - time_since_last)
-
-    response = client.chat.complete(**kwargs)
-    last_mistral_request_time = time.time()
-    return response
-
-
 def fetch_samba_models(logger):
     logger.info("Fetching SambaNova models...")
     r = requests.get("https://cloud.sambanova.ai/api/pricing")

src/requirements.txt

@@ -1,5 +1,4 @@
-requests
-python-dotenv
-google-cloud-quotas
-mistralai
-beautifulsoup4
+requests==2.33.1
+python-dotenv==1.2.2
+google-cloud-quotas==0.6.0
+beautifulsoup4==4.14.3