feat(migration): implement interactive mapping resolution workflow

- Add SQLite database integration for environments and mappings
- Update TaskManager to support pausing tasks (AWAITING_MAPPING)
- Modify MigrationPlugin to detect missing mappings and wait for resolution
- Add frontend UI for handling missing mappings interactively
- Create dedicated migration routes and API endpoints
- Update .gitignore and project documentation

specs/005-fix-ui-ws-validation/contracts/ws-logs.md

@@ -0,0 +1,24 @@
+# WebSocket Contract: Task Logs
+
+## Endpoint
+`WS /ws/logs/{task_id}`
+
+## Description
+Streams real-time logs for a specific task.
+
+## Connection Parameters
+- `task_id`: UUID of the task to monitor.
+
+## Message Format (Server -> Client)
+```json
+{
+  "task_id": "uuid",
+  "message": "Log message text",
+  "timestamp": "2025-12-20T20:20:00Z",
+  "level": "INFO"
+}
+```
+
+## Error Handling
+- If `task_id` is invalid, the connection is closed with code `4004` (Not Found).
+- If the connection fails, the client should attempt reconnection with exponential backoff.