Update .gitignore to include environment secrets and modify autopilot state documentation

- Added .env to .gitignore to prevent tracking of environment secrets.
- Updated autopilot state in _docs/_autopilot_state.md: changed step from 9 (Implement) to 13 (Deploy) and updated sub-step to 1 — Status & Env Check.

These changes enhance security by ignoring sensitive files and improve clarity in task management.

.env.example

@@ -0,0 +1,37 @@
+# Azaion AI Training — Environment Variables
+# Copy to .env and fill in real values. Never commit .env to version control.
+
+# ── Azaion REST API ──
+AZAION_API_URL=https://api.azaion.com
+AZAION_API_EMAIL=uploader@azaion.com
+AZAION_API_PASSWORD=changeme
+
+# ── RabbitMQ Streams ──
+RABBITMQ_HOST=127.0.0.1
+RABBITMQ_PORT=5552
+RABBITMQ_USER=azaion_receiver
+RABBITMQ_PASSWORD=changeme
+RABBITMQ_QUEUE_NAME=azaion-annotations
+
+# ── Filesystem paths ──
+AZAION_ROOT_DIR=/azaion
+AZAION_DATA_DIR=data
+AZAION_DATA_SEED_DIR=data-seed
+AZAION_DATA_DELETED_DIR=data_deleted
+
+# ── Training parameters ──
+TRAINING_MODEL=yolo26m.pt
+TRAINING_EPOCHS=120
+TRAINING_BATCH_SIZE=11
+TRAINING_IMGSZ=1280
+TRAINING_SAVE_PERIOD=1
+TRAINING_WORKERS=24
+
+# ── Export ──
+EXPORT_ONNX_IMGSZ=1280
+
+# ── Docker (deploy scripts) ──
+DOCKER_REGISTRY=registry.example.com
+DOCKER_IMAGE_TAG=latest
+DEPLOY_HOST=gpu-server.example.com
+DEPLOY_USER=deploy