Fix Prisma OpenSSL error on Alpine Linux (Docker)

- Add openssl + openssl-dev to Dockerfile apk install; Alpine does not
  ship OpenSSL by default but Prisma's query engine binary requires it
- Add binaryTargets to schema.prisma generator:
    native                    → used during docker build (npx prisma generate)
    linux-musl-openssl-3.0.x  → correct engine binary for Alpine at runtime
  Without the explicit target Prisma defaults to openssl-1.1.x, which
  does not exist on Alpine 3.18+, producing the "Could not parse schema
  engine response" error at migrate/startup time

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Dockerfile

@@ -2,8 +2,8 @@ FROM node:20-alpine
 
 WORKDIR /app
 
-# Install build tools needed for better-sqlite3 native bindings
-RUN apk add --no-cache python3 make g++
+# Install build tools + OpenSSL (required by Prisma query engine on Alpine)
+RUN apk add --no-cache python3 make g++ openssl openssl-dev
 
 # Copy package manifests
 COPY package*.json ./