Update section headers in README.md to second-level

Author: Dreipfelt

README.md

@@ -104,7 +104,7 @@ uvicorn models.crime_predictor.src.predict:app --reload --port 8000
 
 ---
 
-# 🔄 Data Pipeline
+## 🔄 Data Pipeline
 data.gouv.fr (SSMSI)
         ↓
 script_crimes_et_delits.py
@@ -125,7 +125,7 @@ After cleaning: 10 columns, ~49,000 rows (<2% loss)
 
 ---
 
-# 🤖 Modeling & Results
+## 🤖 Modeling & Results
 Features
 Feature	Description
 annee	Year (int)
@@ -155,7 +155,7 @@ mlflow ui --backend-store-uri models/crime_predictor/mlruns
 
 ---
 
-# 📊 Streamlit Dashboard
+## 📊 Streamlit Dashboard
 
 5 interactive pages:
 | Page                 | Content                                               |
@@ -167,7 +167,8 @@ mlflow ui --backend-store-uri models/crime_predictor/mlruns
 | Ethics & Limitations | Biases and usage limits                               |
 
 ---
-# 🌐 FastAPI Endpoints
+
+## 🌐 FastAPI Endpoints
 Available Endpoints
 | Method | Endpoint   | Description                       |
 | ------ | ---------- | --------------------------------- |
@@ -188,7 +189,7 @@ curl -X POST http://localhost:8000/predict \
 
 ---
 
-🧪 Tests
+## 🧪 Tests
 # Run all tests
 pytest models/crime_predictor/tests/ -v
 
@@ -204,7 +205,7 @@ Test coverage:
 
 --- 
 
-🐳 Docker & CI/CD
+## 🐳 Docker & CI/CD
 Multi-stage Docker
 # Build (training → production)
 docker build -t oasis-security:latest .
@@ -228,7 +229,7 @@ GitHub Actions CI/CD
 
 --- 
 
-# ⚠️ Ethics & Limitations
+## ⚠️ Ethics & Limitations
 
 This model is a statistical exploration tool, not an operational decision system.