fix: add requirements.txt and pin Python 3.12 for Render

Author: prithaxdev

apps/api/.python-version

@@ -0,0 +1 @@
+3.12.0

apps/api/render.yaml

@@ -2,7 +2,7 @@ services:
   - type: web
     name: codepulse-api
     runtime: python
-    buildCommand: pip install -e .
+    buildCommand: pip install -r requirements.txt
     startCommand: uvicorn app.main:app --host 0.0.0.0 --port $PORT
     healthCheckPath: /api/health
     envVars:

apps/api/requirements.txt

@@ -0,0 +1,7 @@
+fastapi>=0.115.0
+uvicorn[standard]>=0.30.0
+pydantic>=2.8.0
+pydantic-settings>=2.4.0
+numpy>=2.0.0
+httpx>=0.27.0
+python-dotenv>=1.0.0