fix: use turbo --filter=web... to skip sdk-ts build in Docker

The builder stage was running 'npx turbo build' which builds ALL workspace
packages including sdk-ts (needs tsup). The web app only depends on
@agentlens/database, not sdk-ts. Using --filter=web... builds only web
and its transitive dependencies.

Dockerfile

@@ -14,7 +14,7 @@ FROM base AS builder
 COPY --from=deps /app/node_modules ./node_modules
 COPY . .
 RUN npx prisma generate --schema=packages/database/prisma/schema.prisma
-RUN npx turbo build
+RUN npx turbo build --filter=web...
 
 FROM base AS migrate
 COPY --from=deps /app/node_modules ./node_modules