temporal: fix Docker build mupdf type resolution

The parent tsconfig's `paths.mupdf` points at `../../node_modules/...`,
correct for the monorepo layout but it walks above WORKDIR inside the
container, where `node_modules` sits next to the tsconfig. Override
`paths` in the build-time tsconfig generated by the Dockerfile so it
resolves to the in-container `./node_modules/...` location.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: strukalex

apps/temporal/Dockerfile

@@ -41,9 +41,26 @@ ENV DATABASE_URL=${DATABASE_URL}
 RUN npx prisma generate --schema=./shared/prisma/schema.prisma
 
 # Copy source and build. Use a build tsconfig that only includes src (exclude prisma.config).
+# The parent tsconfig's `paths.mupdf` is `../../node_modules/...` (correct for the monorepo
+# layout); in this container `node_modules` sits next to the tsconfig, so we re-declare
+# `paths` here to point at the in-container location. `paths` in an extending config
+# replaces — not merges with — the parent's, so `@generated/*` must be repeated.
 COPY apps/temporal/src ./src
-RUN echo '{"extends":"./tsconfig.json","compilerOptions":{"rootDir":"./src"},"include":["src/**/*.ts"]}' > tsconfig.build.json && \
-    npx tsc -p tsconfig.build.json
+RUN cat > tsconfig.build.json <<'EOF'
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "rootDir": "./src",
+    "baseUrl": ".",
+    "paths": {
+      "@generated/*": ["src/generated/*"],
+      "mupdf": ["./node_modules/mupdf/dist/mupdf"]
+    }
+  },
+  "include": ["src/**/*.ts"]
+}
+EOF
+RUN npx tsc -p tsconfig.build.json
 
 # Production stage
 FROM node:24-bookworm-slim AS production