feat: enhance asset import functionality and unit tracking

- Added WHISPER_URL environment variable to docker-compose for audio transcription service.
- Updated Nginx configuration to increase timeout settings for API requests.
- Enhanced asset ingestion process to extract unit numbers from ZIP entry paths, supporting various naming conventions.
- Implemented logic to split intensive courses into two regular courses during asset import.
- Added new fields to the Asset and QuestionBank models to track unit numbers and source asset links.
- Introduced backward-compatible fallbacks for fetching study plans and courses from legacy MySQL database.
- Improved error handling and progress tracking during ZIP file uploads in the frontend.
- Created a new SQL migration to add unit_number and source_asset_id columns to the assets and question_bank tables, along with necessary indexes for performance.

web/studio/Dockerfile

@@ -37,8 +37,13 @@ FROM node:20-slim AS runner
 WORKDIR /app
 ENV NODE_ENV production
 
-# Install system dependencies for Rust binary
-RUN apt-get update && apt-get install -y openssl ca-certificates && rm -rf /var/lib/apt/lists/*
+# Install system dependencies for Rust binary and asset processing
+RUN apt-get update && apt-get install -y \
+	openssl \
+	ca-certificates \
+	ffmpeg \
+	poppler-utils \
+	&& rm -rf /var/lib/apt/lists/*
 
 # Install sharp for Next.js image optimization
 RUN --mount=type=cache,target=/root/.npm npm install sharp