chore: separate Python dependencies for development (#3198)

api/requirements-dev.txt

@@ -0,0 +1,4 @@
+coverage~=7.2.4
+pytest~=7.3.1
+pytest-mock~=3.11.1
+pytest-benchmark~=4.0.0

api/requirements.txt

@@ -1,4 +1,3 @@
-coverage~=7.2.4
 beautifulsoup4==4.12.2
 flask~=3.0.1
 Flask-SQLAlchemy~=3.0.5
@@ -16,9 +15,6 @@ tiktoken~=0.6.0
 psycopg2-binary~=2.9.6
 pycryptodome==3.19.1
 python-dotenv==1.0.0
-pytest~=7.3.1
-pytest-mock~=3.11.1
-pytest-benchmark~=4.0.0
 Authlib==1.2.0
 boto3==1.28.17
 tenacity==8.2.2