Pipelinen parannuksia building blockeilla

zipit/loop_runs/v4_docker/requirements

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+**PROJECT NAME:** Todo-sovellus
+
+**GOAL:** The software is a simple task manager for individuals to keep track of their daily tasks and manage them efficiently.
+
+**CORE FEATURES:**
+1. Create new todos with title, description, due date, and status.
+2. Read (view) all todos or filter by status (e.g., pending, completed).
+3. Update existing todos (change title, description, due date, status).
+4. Delete todos that are no longer needed.
+5. Mark a todo as complete.
+6. View the total number of todos and count by status.
+
+**DATA MODEL:**
+1. **Todo**
+   - id (integer, primary key)
+   - title (string, required)
+   - description (text, optional)
+   - due_date (date, optional)
+   - status (enum: 'pending', 'completed')
+
+**API ENDPOINTS:**
+1. **GET /todos** - Retrieve all todos.
+2. **GET /todos?status=...** - Filter todos by status (e.g., `/todos?status=pending`).
+3. **POST /todos** - Create a new todo.
+4. **PUT /todos/{id}** - Update an existing todo.
+5. **DELETE /todos/{id}** - Delete a todo.
+
+**CONSTRAINTS:**
+- Must use SQLite as the database.
+- No authentication is required for accessing endpoints.