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

.gitignore

@@ -1,21 +1,63 @@
-*__pycache__*
-*.ps1
-keyring passwords.py
-*logs*
-*github*
-*venv*
-*git*
-*tech_spec*
-dashboards
-# Python specific
-*.pyc
-dist/
-*.egg-info/
-
-# Node.js specific
-node_modules/
+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+*.so
+.Python
 build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+pip-wheel-metadata/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+.venv
+venv/
+ENV/
+env/
+backend/backups/*
+
+# Node.js
+node_modules/
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+.svelte-kit/
+.vite/
+build/
+dist/
 .env*
 config.json
 
-backend/backups/*
+# Logs
+*.log
+backend/backend.log
+
+# OS
+.DS_Store
+Thumbs.db
+
+# IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+
+# Project specific
+*.ps1
+keyring passwords.py
+*github*
+*git*
+*tech_spec*
+dashboards