docs(agile): initialize docs

docs/architecture/development-workflow.md

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+# 7. Development Workflow
+
+1.  **Initial Setup:**
+    *   Clone the repository.
+    *   Create a `.env` file with the `DATABASE_URL`.
+    *   Run `docker-compose up -d --build` to start the PostgreSQL container and the Nuxt development server.
+2.  **Schema Changes:**
+    *   Modify `prisma/schema.prisma`.
+    *   Run `npx prisma migrate dev --name <migration-name>` to apply changes to the running database. Prisma Client will be auto-generated.
+3.  **Development:**
+    *   Develop Vue components in the `app/` directory.
+    *   Develop API endpoints in the `server/api/` directory.
+    *   The Nuxt dev server will provide hot-reloading for both frontend and backend changes.