Implement async processing with Celery, Redis, and queue-based email notifications

Dockerfile

@@ -9,9 +9,9 @@ LABEL description="Scraibe: LocalAI-backed transcription and diarization client
                     Sends audio to a LocalAI server running vibevoice.cpp and uses a second LLM for summarization."
 LABEL url="https://git.optimex.systems/admin/scribe"
 
-# Install system dependencies (ffmpeg required)
+# Install system dependencies (ffmpeg, redis)
 RUN apt update -y && \
-    apt install -y --no-install-recommends ffmpeg && \
+    apt install -y --no-install-recommends ffmpeg redis-server && \
     apt clean && \
     rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
 
@@ -31,6 +31,11 @@ ENV SUMMARIZER_MODEL=qwen3-14b
 # Gradio / Web GUI
 ENV GRADIO_SERVER_NAME=0.0.0.0
 
+# Async processing (Celery + Redis)
+ENV CELERY_BROKER_URL=redis://localhost:6379/0
+ENV CELERY_RESULT_BACKEND=redis://localhost:6379/0
+ENV SCRAIBE_UPLOAD_DIR=/tmp/scraibe_uploads
+
 # Copy and install Python dependencies
 COPY requirements.txt /app/src/requirements.txt
 RUN pip install --no-cache-dir -r requirements.txt
@@ -41,9 +46,8 @@ COPY scraibe /app/src/scraibe
 # Copy custom Web GUI assets (header, footer, templates, logos, config)
 COPY misc /app/src/misc
 
-# Expose port (for Web GUI)
+# Expose ports
 EXPOSE 7860
 
-# Run the Web GUI by default (never the CLI)
-# Use python -m scraibe so __main__.py forces web GUI.
-CMD ["python3", "-m", "scraibe"]
+# Run the Web GUI and Celery worker (with Redis) by default
+CMD ["/bin/bash", "-c", "redis-server --daemonize yes && celery -A scraibe.celery_app worker -Q transcription -l info & python3 -m scraibe"]