Add job processing system with streaming endpoint

Introduced a `processing` router to handle job streaming using server-sent events. Added `Jobs` and `JobStatus` models for managing job-related data, along with database creation logic. Updated the `sample` router to create new job entries during experiment creation.

backend/Dockerfile

@@ -7,6 +7,8 @@ RUN mkdir -p /app/backend/ssl
 
 # Install system dependencies
 RUN apt-get update && apt-get install -y --no-install-recommends \
+    wget \
+    default-jre \
     build-essential \
     unixodbc-dev \
     libmariadb-dev \