fix(deploy): add .js extensions to transpiled migration imports for ESM compatibility

Dockerfile

@@ -41,8 +41,10 @@ COPY . .
 # Build application
 RUN pnpm build
 
-# Transpile migrations for production runner
+# Transpile migrations to JS for production compatibility (ESM requires extensions)
-RUN pnpm exec tsc migrations/*.ts --outDir migrations_built --module esnext --target esnext --moduleResolution node --esModuleInterop --skipLibCheck || true
+RUN npx tsc migrations/*.ts --outDir migrations --module esnext --target esnext --moduleResolution node --esModuleInterop --skipLibCheck || true && \
+    sed -i 's/from "\.\/\([^"]*\)";/from ".\/\1.js";/g' migrations/index.js && \
+    rm migrations/*.ts
 
 # Stage 2: Runner
 FROM node:20-alpine AS runner