chore: Remove backup files and add .gitignore

- Remove tracked backup files (*.bak, *.neuralstream.bak)
- Remove debug_curator.py
- Add comprehensive .gitignore
- Prevents future backup/debug files from being committed

.gitignore

@@ -0,0 +1,59 @@
+# TrueRecall v2 - .gitignore
+# Files that should not be committed to version control
+
+# Backup files
+*.bak
+*.bak.*
+*~
+*.swp
+*.swo
+*.orig
+*.save
+
+# Debug and temporary files
+debug_*
+test_*
+temp_*
+*.tmp
+
+# Log files
+*.log
+logs/
+log/
+
+# Python cache
+__pycache__/
+*.py[cod]
+*$py.class
+*.so
+.Python
+
+# Virtual environments
+venv/
+env/
+ENV/
+
+# IDE/editor files
+.vscode/
+.idea/
+*.iml
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# Environment/config with secrets (if they exist locally)
+.env
+.env.local
+config.local.json
+
+# Local data that shouldn't be shared
+data/
+datasets/
+*.db
+*.sqlite
+
+# Build artifacts
+build/
+dist/
+*.egg-info/