fix: infrastructure for prod-parity deployment

Added db schema migration script (scripts/migrate.js) for fresh deployments,
updated Dockerfile to include scripts directory, and fixed job-progress test
to include newly added retry fields after D3 foundation merge.

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

Dockerfile

@@ -31,6 +31,7 @@ RUN apk add --no-cache ffmpeg tzdata python3 py3-pip && \
 COPY --from=builder --chown=node:node /app/build ./build
 COPY --from=builder --chown=node:node /app/node_modules ./node_modules
 COPY --from=builder --chown=node:node /app/package.json ./
+COPY --from=builder --chown=node:node /app/scripts ./scripts
 
 USER node