feat: Flask-App-Factory mit Health-Check und QueueHandler

src/app.py

@@ -0,0 +1,22 @@
+from flask import Flask
+
+from src.queue.handler import QueueHandler
+
+
+def create_app() -> Flask:
+    """Erstellt und konfiguriert die Flask-App."""
+    app = Flask(__name__)
+    app.config.from_mapping(
+        REDIS_HOST="localhost",
+        REDIS_PORT=6379,
+    )
+    app.queue_handler = QueueHandler(  # type: ignore[attr-defined]
+        redis_host=app.config["REDIS_HOST"],
+        redis_port=app.config["REDIS_PORT"],
+    )
+
+    @app.route("/health")
+    def health() -> dict[str, object]:
+        return {"status": "ok", "queue_size": app.queue_handler.queue_size()}  # type: ignore[attr-defined]
+
+    return app