fix: API copy Prisma from pnpm store, AI drop Rust/maturin approach

- API: copy @prisma/client + .prisma from build stage pnpm store glob
  (pnpm deploy --prod doesn't include generated Prisma client)
- AI: remove Rust toolchain, install underthesea 6.8.0 with fallback to 6.3.4
  (underthesea-core maturin build too complex for Kaniko)

Co-Authored-By: Claude Opus 4 (1M context) <noreply@anthropic.com>

apps/api/Dockerfile

@@ -35,13 +35,8 @@ RUN npx prisma generate \
     && cd apps/api && npx nest build
 
 # Use pnpm deploy to produce a flat, production-only node_modules
-# Then install prisma + generate client in pruned dir (pnpm deploy strips dev deps)
-RUN pnpm deploy --legacy --filter @goodgo/api --prod /app/pruned \
-    && cd /app/pruned \
-    && cp -r /app/prisma ./prisma \
-    && npm install --no-save prisma @prisma/client \
-    && npx prisma generate \
-    && npm remove --no-save prisma
+# Copy generated Prisma client from build stage (pnpm deploy doesn't carry it)
+RUN pnpm deploy --legacy --filter @goodgo/api --prod /app/pruned
 
 # ---- Production ----
 FROM node:22-slim AS production
@@ -60,12 +55,15 @@ WORKDIR /app
 
 ENV NODE_ENV=production
 
-# Copy pruned production node_modules from pnpm deploy (includes Prisma)
+# Copy pruned production node_modules
 COPY --from=build --chown=node:node /app/pruned/node_modules ./node_modules
 # Copy compiled application
 COPY --from=build --chown=node:node /app/apps/api/dist ./dist
 # Prisma schema + migrations (needed for runtime client & migrate deploy)
 COPY --from=build --chown=node:node /app/prisma ./prisma
+# Copy generated Prisma client from build stage (not from pruned)
+COPY --from=build --chown=node:node /app/node_modules/.pnpm/@prisma+client@*/node_modules/@prisma/client ./node_modules/@prisma/client
+COPY --from=build --chown=node:node /app/node_modules/.pnpm/@prisma+client@*/node_modules/.prisma ./node_modules/.prisma
 # Package metadata
 COPY --from=build --chown=node:node /app/apps/api/package.json ./package.json
 # Entrypoint script